Hydraena, Taxa Only, Exact Match: 734 Treatments

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Hydraena (Hydraenopsis) paulmoritz   sp. nov.  Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 66-67 66-67
Hydraena pacificica   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 110 110
Hydraena dilutipes     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 109-112 109-112
Hydraena cunninghamensis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 67 67
Hydraena jubilata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 36-37 36-37
Hydraena (Monomadraena) acicula     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 48 48
Hydraena hosseinieorum     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 34-40 34-40
Hydraena propria   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 67-68 67-68
Hydraena luminicollis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 38-39 38-39
Hydraena fasciola     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 38-39 38-39
Hydraena pamphylia     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena (Hydraena) cordata     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 456 456
Hydraena altapapua   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 57 57
Hydraena (Hydraenopsis) longicollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 67 67
Hydraena ambiflagellata     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 89-90 89-90
Hydraena (Hydraenopsis) jojoorculloi   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 12-15 12-15
Hydraena atroscintilla   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 35-36 35-36
Hydraena johncoltranei   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 141-142 141-142
Hydraena cameroconcava   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 9 9
Hydraena monteithi   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 41-42 41-42
Hydraena duohamata   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 16-17 16-17
Hydraena subintegra     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena morio     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena fascinata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 74-75 74-75
Hydraena (Hydraena) bihamata     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena paxillipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 61-62 61-62
Hydraena multiarcuata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 62-64 62-64
Hydraena latisoror   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 22-23 22-23
Hydraena caucasica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Coleoptera   new species  Zwick, Peter, 1977, Australian Hydraena (Coleoptera: Hydraenidae), Australian Journal of Zoology 25, No. 1, pp. 147-184 : 169 169
Hydraena parvipalpis   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 17-19 17-19
Hydraena variopaca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 94 94
Hydraena habitiva   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 68-69 68-69
Hydraena hyalina     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 51-52 51-52
Hydraena anaphora     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 52 52
Hydraena rudallensis     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 69-70 69-70
Hydraena bisinuloba   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 31-32 31-32
Hydraena (Hydraenopsis) pseudopalawanensis   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 29-31 29-31
Hydraena (Holcohydraena) punctata     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 64 64
Hydraena (Hydraenopsis) arizonica     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 64 64
Hydraena camerocameola   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 24-25 24-25
Hydraena undetermined     Rogers, D. Christopher & Cruz-Rivera, Edwin, 2021, A preliminary survey of the inland aquatic macroinvertebrate biodiversity of St. Thomas, US Virgin Islands, Journal of Natural History 55 (13 - 14), pp. 799-850 : 829 829
Hydraena tibiopaca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 101-102 101-102
Hydraena pantanalensis   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 46-47 46-47
Hydraena millenaria   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 21-22 21-22
Hydraena nitidimenta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 37-38 37-38
Hydraena forticollis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 113-114 113-114
Hydraena orchisa   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 138-139 138-139
Hydraena pentarubra   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 95-97 95-97
Hydraena robusta     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 64-65 64-65
Hydraena bubulla   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 70 70
Hydraena huonica     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 48-49 48-49
Hydraena browni     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 44 44
Hydraena (Hydraenopsis) spiralis   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 27-29 27-29
Hydraena (Hydraenopsis) kodadai   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 24-26 24-26
Hydraena     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 17 17
Hydraena ambiosina   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 81-82 81-82
Hydraena humanica   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 59-61 59-61
Hydraena quechua     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 45 45
Hydraena receptiva   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 133-134 133-134
Hydraena contorta   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 134-136 134-136
Hydraena (Holcohydraena) pacifica     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 63 63
Hydraena pilobova   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 117-120 117-120
Hydraena australica     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 73 73
Hydraena steineri   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 57 57
Hydraena (Hydraenopsis) concatenata   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 17 17
Hydraena marojejy   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 100-101 100-101
Hydraena perkinsi     DELER-HERNÁNDEZ, ALBERT & DELGADO, JUAN A., 2012, The Hydraenidae of Cuba (Insecta: Coleoptera) I: Contribution to the fauna of eastern Cuba, Zootaxa 3478 (1), pp. 213-238 : 220-222 220-222
Hydraena ambra   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 19-21 19-21
Hydraena diadema   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 62 62
Hydraena reticulobesa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 86 86
Hydraena (Hydraena) dinarica   sp. n.  Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena altiphila   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 60 60
Hydraena (Hydraenopsis) hyalina     Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A. & Hamada, Neusa, 2021, Morphological remarks on Adelphydraena amazonica Perkins & Ribera, 2020 and new records of two other Hydraenidae from Brazil (Coleoptera), Zootaxa 4966 (1), pp. 61-68 : 67-68 67-68
Hydraena extorris     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 94-95 94-95
Hydraena jubata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 91-93 91-93
Hydraena gynaephila     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 29-33 29-33
Hydraena genuvela   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 21-24 21-24
Hydraena (Hydraenopsis) matthiasi   sp. nov.  Deler-Hernández, Albert, Fikáček, Martin & Delgado, Juan A., 2017, The Hydraenidae of Cuba (Insecta: Coleoptera) III. Description of two new hygropetric species of Hydraena Kugelann, Zootaxa 4250 (5), pp. 434-446 : 439-443 439-443
Hydraena cameropetila   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 17 17
Hydraena speciosa     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 33-34 33-34
Hydraena     Stanković, Vlatka Mičetić & Jäch, Manfred A., 2012, Description of a new species of the “ Haenydra ” lineage (Coleoptera: Hydraenidae) from the Republic of Macedonia, Zootaxa 3503, pp. 82-88 : 83 83
Hydraena luridipennis     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 54-56 54-56
Hydraena bicarina   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 77-81 77-81
Hydraena pulchella     PROKIN, Alexander A., LITOVKIN, Stanislav V. & JÄCH, Manfred A., 2015, New records of Hydraenidae and Elmidae (Coleoptera) from Russia and adjacent countries, Fragmenta Faunistica 58 (2), pp. 99-110 : 101 101
Hydraena bisinuata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 69-72 69-72
Hydraena (Hydraena) leprieuri     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 106 106
Hydraena camerosetosa   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 29-30 29-30
Hydraena okapa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 73-74 73-74
Hydraena amplipunctata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 73-76 73-76
Hydraena mauriciogarciai   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 40 40
Hydraena inplacopaca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 99 99
Hydraena marginicollis     Robert H. Turnbow, Jr. & Thomas, Michael C., 2008, An annotated checklist of the Coleoptera (Insecta) of the Bahamas, Insecta Mundi 2008 (34), pp. 1-64 : 40 40
Hydraena capacis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 94 94
Hydraena (Hydraena) audisioi     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 105 105
Hydraena morio     Dovgal, Igor & Pešić, Vladimir, 2012, Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region, Zootaxa 3166, pp. 34-40 : 37 37
Hydraena ambroides   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 22-23 22-23
Hydraena (Hydraenopsis) scintillutea     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 430 430
Hydraena (Hydraenopsis) terralta     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 430 430
Hydraena (Hydraenopsis) saotometerrestris   sp. nov.  Bilton, David T., 2023, Two new species of Hydraena Kugelann, 1794 from São Tomé Island-an apparent adaptive radiation (Coleoptera, Hydraenidae), Zootaxa 5254 (4), pp. 593-600 : 594-595 594-595
Hydraena disparamera   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 105-106 105-106
Hydraena longiloba   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 121-124 121-124
Hydraena cordispina   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 23-24 23-24
Hydraena costiniceps     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 24 24
Hydraena costiniceps     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 24 24
Hydraena     Luna-Luna, Alba Magali, Martins, Caleb Califre, Lopez-Perez, Andres, Ramirez-Ponce, Andres & Contreras-Ramos, Atilano, 2022, Aquatic beetle diversity from Volcan Tacana, Mexico: altitudinal distribution pattern and biogeographical affinity of the fauna, ZooKeys 1111, pp. 301-338 : 301 301
Hydraena cameroarida   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 23-24 23-24
Hydraena dariensis   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 44 44
Hydraena     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 18-19 18-19
Hydraena fritzi     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena (Monomadraena) simplicata     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 60 60
Hydraena remulipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 45-46 45-46
Hydraena particeps     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 45 45
Hydraena (Hydraena) tenjikuana     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena (Hydraenopsis) lenticula   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 55-57 55-57
Hydraena limbobesa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 89-90 89-90
Hydraena curvosa   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 19-20 19-20
Hydraena premordica     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 56 56
Hydraena innuda   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 18-19 18-19
Hydraena thola   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 134-135 134-135
Hydraena finita     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena parva     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 77-78 77-78
Hydraena cameroflagellata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 28-29 28-29
Hydraena cameroradiata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 29 29
Hydraena coryleti     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena acicula   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 48-49 48-49
Hydraena xingu   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 16 16
Hydraena bucollis   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 142-144 142-144
Hydraena (Hydraenopsis) particeps     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 68 68
Hydraena (Hydraenopsis) marginicollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 67-68 67-68
Hydraena ancyrae     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena akbesiana     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena aurita     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena attaleiae     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena antiochena     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena decepta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 33-34 33-34
Hydraena fundata   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 117-118 117-118
Hydraena bodemeyeri     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena bicolorata     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena cata     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena fundaequalis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 118-119 118-119
Hydraena thumbelina   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 29-30 29-30
Hydraena (Hydraenopsis) formula     Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 54-55 54-55
Hydraena undetermined     Thomas, Michael C., Robert H. Turnbow, Jr. & Steiner, Warren, 2013, An annotated checklist of the Coleoptera (Insecta) of the Cayman Islands, West Indies, Insecta Mundi 2013 (280), pp. 1-56 : 32 32
Hydraena ramuensis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 65-66 65-66
Hydraena tenuisoror   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 21-22 21-22
Hydraena unita   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 47-48 47-48
Hydraena clystera     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 48 48
Hydraena trichotarsa     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 26 26
Hydraena rubrifurcata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 80-81 80-81
Hydraena eichleri     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena inancala   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 93 93
Hydraena ispirensis   sp. nov.  Lu, Ahmet Kasapo Ġ, Jäch, Manfred A. & Skale, André, 2010, Two new species of Hydraena (s. str.) Kugelann (Coleoptera: Hydraenidae) from northern Turkey, Zootaxa 2353, pp. 62-64 : 63-64 63-64
Hydraena carmelita   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 129-130 129-130
Hydraena carinocisiva   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 130 130
Hydraena andranomena   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 130-132 130-132
Hydraena brittoni     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 26-27 26-27
Hydraena (Hydraenopsis) pulsatrix     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 68-69 68-69
Hydraena pilotumida   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 116 116
Hydraena     Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 31 31
Hydraena tridigita   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 31-32 31-32
Hydraena (Hydraenopsis) sahlbergi     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 430 430
Hydraena (Hydraena) africana     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 455 455
Hydraena (Holcohydraena) exarata     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 455 455
Hydraena (Hydraena) allomorpha     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 455 455
Hydraena tetana   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 49-50 49-50
Hydraena (Hydraenopsis) palawanensis     Freitag, Hendrik, 2013, Hydraena (Hydraenopsis) ateneo, new species (Coleoptera, Hydraenidae) and other aquatic Polyphaga from a small habitat patch in a highly urbanized landscape of Metro Manila, Philippines, ZooKeys 329, pp. 9-21 : 16 16
Hydraena     Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 38-39 38-39
Hydraena manjakatompo   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 104-105 104-105
Hydraena key    Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 70-71 70-71
Hydraena sexsuprema   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 81-82 81-82
Hydraena serripennis   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 24-25 24-25
Hydraena multiloba   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 63-64 63-64
Hydraena (Holcohydraena) chandleri   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 52 52
Hydraena funda   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 146-147 146-147
Hydraena (Monomadraena) tibiodentipes     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 67-68 67-68
Hydraena lubrica   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 52-53 52-53
Hydraena (Hydraenopsis) michaelbalkei   sp. nov.  Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 65 65
Hydraena ulna   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 121-122 121-122
Hydraena lassulipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 38-39 38-39
Hydraena     Lee, Dae-Hyun & Ahn, Kee-Jeong, 2016, A taxonomic review of the Hydraenidae in South Korea (Coleoptera), ZooKeys 634, pp. 57-78 : 59 59
Hydraena metzeni   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 119 119
Hydraena converga   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 27-28 27-28
Hydraena (Hydraena) minutissima     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena tobogan   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 33-34 33-34
Hydraena divisa   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 120-121 120-121
Hydraena cygnus     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 91-92 91-92
Hydraena (Hydraena) rivularis     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 107 107
Hydraena (Hydraenopsis) guanajuatoensis   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 20 20
Hydraena (Hydraenopsis) curvosa     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena (Hydraenopsis) hyalina     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena (Hydraenopsis) nanoscintilla     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena (Hydraenopsis) bahiana     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 427-428 427-428
Hydraena camerojocula   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 11 11
Hydraena malkini     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 45 45
Hydraena (Hydraenopsis) browni     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena billi     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 43 43
Hydraena punctilata   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 17-18 17-18
Hydraena amazonica   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 27-28 27-28
Hydraena (Hydraenopsis) castanescens   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 19-22 19-22
Hydraena flagella   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 65-66 65-66
Hydraena pertransversa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 90 90
Hydraena carica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena nanocolorata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 63-64 63-64
Hydraena processa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 111-112 111-112
Hydraena bacchusi   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 95-96 95-96
Hydraena (Hydraenopsis) unita     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 430 430
Hydraena storeyi   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 85-86 85-86
Hydraena mianminica   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 35 35
Hydraena australula   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 76 76
Hydraena (Holcohydraena) arenicola     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 62 62
Hydraena (Holcohydraena) appalachicola     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 61 61
Coleoptera   new species  Kugelann, Johann Gottlieb, 1794, Verzeichniss der in einigen Gegenden Preussens bis jetzt entdeckten Käfer-Arten, nebst kurzen Nachrichten von denselben, Neuestes Magazin für die Liebhaber der Entomologie / Schneider 1, No. 5, pp. 513-582 : 579 579
Hydraena (Hydraena) antiatlantica     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 455 455
Hydraena steineri     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 57 57
Hydraena gereckei   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 101-102 101-102
Hydraena (Hydraenopsis) bahiana   sp. nov.  Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A. & Hamada, Neusa, 2022, Hydraena bahiana sp. n., a new minute moss beetle (Coleoptera, Hydraenidae) from highlands of Northeast Brazil, Zootaxa 5128 (4), pp. 538-546 : 539-545 539-545
Hydraena penultimata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 54-55 54-55
Hydraena gracilidelphis   sp. nov.  Trizzino, Marco, Valladares, Luis F., Garrido, Josefina & Audisio, Paolo, 2012, Morphological reply to a DNA call: a new cryptic species of Hydraena from western Europe, with a complete overview of the Hydraena gracilis complex (Coleoptera: Hydraenidae: “ Haenydra ” lineage), Journal of Natural History 46 (17 - 18), pp. 1065-1078 : 1067-1072 1067-1072
Hydraena revelovela   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 46 46
Hydraena quatriloba   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 35-38 35-38
Hydraena anatolica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena (Hydraenopsis) orcula     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena ampla   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 61 61
Hydraena (Hydraenopsis) fontana     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561-562 561-562
Hydraena (Hydraenopsis) tenuis     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena (Hydraenopsis) formula     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena shorti   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 41-42 41-42
Hydraena sexarcuata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 47-48 47-48
Hydraena (Hydraenopsis) reducta   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 24 24
Hydraena impala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 106 106
Hydraena delvasi     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 50 50
Hydraena (Hydraenopsis) palawanensis   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 26-29 26-29
Hydraena (Hydraena) gattolliati     Ribera, Ignacio, Hernando, Carles & Cieslak, Alexandra, 2019, Aquatic Coleoptera of North Oman, with description of new species of Hydraenidae and Hydrophilidae, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 253-272 : 258 258
Hydraena copulata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 71-72 71-72
Hydraena spinissima   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 35-36 35-36
Hydraena dorrigoensis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 36 36
Hydraena buscintilla   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 25-26 25-26
Hydraena acumena   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 55-56 55-56
Hydraena casacolumna   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 53-54 53-54
Hydraena prokini     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 40-62 40-62
Hydraena (Hydraenopsis) josefinae     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 25-26 25-26
Hydraena saluta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 87-88 87-88
Hydraena spatula     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 58 58
Hydraena quadriplumipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 77-78 77-78
Hydraena hypipamee   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 68 68
Hydraena rosannae     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 64-97 64-97
Hydraena ravoandrina   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 105-106 105-106
Hydraena ecuadormica   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 56 56
Hydraena simplipes     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 63-64 63-64
Hydraena trinidensis     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 42 42
Hydraena assimilis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena reflectiva   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 18-19 18-19
Hydraena (Hydraenopsis) bituberculata     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 64 64
Hydraena barbipes     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 53-54 53-54
Hydraena (Hydraenopsis) campbelli     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 64-65 64-65
Hydraena     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 15-16 15-16
Hydraena biseptosa   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 70-73 70-73
Hydraena aquila   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 75-76 75-76
Hydraena armeniaca     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena lilianae   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 37-38 37-38
Hydraena paraguayensis     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 38 38
Hydraena pavicula     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 38 38
Hydraena smyrnensis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 37 37
Hydraena phainops   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 31-32 31-32
Hydraena cheesmanae   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 46 46
Hydraena (Spanglerina) arcei   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 30-36 30-36
Hydraena trapezoidalis     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 115-116 115-116
Hydraena simplicicollis     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 24-25 24-25
Hydraena (Monomadraena) impressicollis     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 38 38
Hydraena camerocorona   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 10-11 10-11
Hydraena photogenica   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 139-140 139-140
Hydraena clavulata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 137-138 137-138
Hydraena (Hydraenopsis) jacobsoni     Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 62-65 62-65
Hydraena ramuquintana   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 125-126 125-126
Hydraena apexa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 123-124 123-124
Hydraena (Hydraenopsis)     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 19 19
Hydraena weiri   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 48 48
Hydraena multispina     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 22 22
Hydraena pennsylvanica     Ciegler, Janet C. & Gemmill, Robert M., 2018, Additional state records for Coleoptera of South Carolina, Insecta Mundi 636, pp. 1-5 : 4 4
Hydraena spangleri     Ciegler, Janet C. & Gemmill, Robert M., 2018, Additional state records for Coleoptera of South Carolina, Insecta Mundi 636, pp. 1-5 : 4 4
Hydraena (Hydraenopsis) maculicollis     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena smyrnensis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 33 33
Hydraena tritropis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 117-118 117-118
Hydraena biundulata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 53-54 53-54
Hydraena amplexa   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 57-58 57-58
Hydraena appetita   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 65-66 65-66
Hydraena pilipes     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 109-110 109-110
Hydraena camerocordata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 26-27 26-27
Hydraena mitchellensis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 13-14 13-14
Hydraena levifurcata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 89-90 89-90
Hydraena reticulositis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 15-16 15-16
Hydraena kellymilleri   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 54 54
Hydraena diazi   sp. nov.  Trizzino, Marco, Jäch, Manfred A., Audisio, Paolo & Ribera, Ignacio, 2011, Molecular and morphological analyses confirm two new species of the Hydraena emarginata – saga clade (Coleoptera, Hydraenidae) from Spain and France, Zootaxa 2760, pp. 29-38 : 30-32 30-32
Hydraena lucernae     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 79 79
Hydraena injectiva   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 34-35 34-35
Hydraena transvallis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 99-100 99-100
Hydraena (Hydraenopsis) ateneo   sp. n.  Freitag, Hendrik, 2013, Hydraena (Hydraenopsis) ateneo, new species (Coleoptera, Hydraenidae) and other aquatic Polyphaga from a small habitat patch in a highly urbanized landscape of Metro Manila, Philippines, ZooKeys 329, pp. 9-21 : 12-15 12-15
Hydraena abbasigili     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena labropaca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 98 98
Hydraena tenuisella   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 49-50 49-50
Hydraena (Hydraenopsis) guadelupensis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 66 66
Hydraena scintillapicta   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 26 26
Hydraena brevipalpis     Perkins, Philip D., 2009, Revisions of the genera Parhydraena Orchymont, Protozantaena Perkins, Decarthrocerus Orchymont, and Parhydraenopsis nomen novum, aquatic and humicolous beetles from Africa and Madagascar, and comparative morphology of the tribe Parhydraenini (Coleoptera: Hydraenidae), Zootaxa 2038, pp. 1-119 : 14 14
Hydraena ranomafana   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 64-65 64-65
Hydraena (Hydraena) numidica     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 106-107 106-107
Hydraena caprivica   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 44-47 44-47
Hydraena ambripes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 21-22 21-22
Hydraena scintillamima   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 28-29 28-29
Hydraena particeps     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 45-46 45-46
Hydraena orcula     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 46 46
Coleoptera   new species  Ordish, Ronald Garth Mr., 1984, Hydraenidae (Insecta: Coleoptera), Fauna of New Zealand 6, pp. 64-64 : 64--1 64--1
Hydraena biimpressa   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 42 42
Hydraena canakcioglui     PROKIN, Alexander A., LITOVKIN, Stanislav V. & JÄCH, Manfred A., 2015, New records of Hydraenidae and Elmidae (Coleoptera) from Russia and adjacent countries, Fragmenta Faunistica 58 (2), pp. 99-110 : 100 100
Hydraena (Hydraenopsis) cuspidicollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 66 66
Hydraena fundextra   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 131-132 131-132
Hydraena herzogestella   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 143-144 143-144
Hydraena nanopala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 115-116 115-116
Hydraena palamita   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 116 116
Hydraenidae     Lee, Dae-Hyun & Ahn, Kee-Jeong, 2016, A taxonomic review of the Hydraenidae in South Korea (Coleoptera), ZooKeys 634, pp. 57-78 : 59 59
Hydraena (Hydraenopsis) pocilla   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 22-24 22-24
Hydraena (Hydraena) riberai     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 456-457 456-457
Hydraena parciplumea   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 75-76 75-76
Hydraena tricosipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 51-52 51-52
Hydraena dudgeoni   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 119-120 119-120
Hydraena zwicki   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 103-104 103-104
Hydraena amidensis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena einsteini   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 83-84 83-84
Hydraena manabica   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 62 62
Hydraena     Meurgey, François & Ramage, Thibault, 2020, Challenging the Wallacean shortfall: A total assessment of insect diversity on Guadeloupe (French West Indies), a checklist and bibliography, Insecta Mundi 2020 (786), pp. 1-183 : 63 63
Hydraena camerosicula   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 12-13 12-13
Hydraena (Hydraenopsis) bubi   sp. nov.  Hernando, Carles & Ribera, Ignacio, 2017, Two new terrestrial species of Hydraena Kugelann from the island of Bioko, Gulf of Guinea (Coleoptera: Hydraenidae), Zootaxa 4238 (2), pp. 281-286 : 281-283 281-283
Hydraena zimbabwensis   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 40-43 40-43
Hydraena (Holcohydraena) quadricurvipes     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 64 64
Hydraena nanula   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 145-146 145-146
Hydraena (Hydraena) nigrita     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena (Hydraenopsis) singaporensis   sp. nov.  Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 67-68 67-68
Hydraena apertista   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 109 109
Hydraena fosterorum   sp. nov.  Trizzino, Marco, Jäch, Manfred A., Audisio, Paolo & Ribera, Ignacio, 2011, Molecular and morphological analyses confirm two new species of the Hydraena emarginata – saga clade (Coleoptera, Hydraenidae) from Spain and France, Zootaxa 2760, pp. 29-38 : 32 32
Hydraena rosannae   sp. nov.  Audisio, Paolo, Trizzino, Marco, Biase, Alessio De, Mancini, Emiliano & Antonini, Gloria, 2009, A new species of Hydraena (Coleoptera: Hydraenidae) of the H. evanescens complex from Sardinia *, Zootaxa 2318, pp. 281-289 : 283-285 283-285
Hydraena torricellica   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 140 140
Hydraena nilguenae     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena nike     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena morio     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena paganettii     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena pachyptera     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena deliquesca   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 111-112 111-112
Hydraena otiarca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 43-45 43-45
Hydraena (Hydraenopsis) pantitillata   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 47-50 47-50
Hydraena namibiensis   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 19-22 19-22
Hydraena venezuela   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 67 67
Hydraena (Hydraenopsis) bicandida   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 15 15
Hydraena pontica     Prokin, A. A. & Sazhnev, A. S., 2019, New records of beetles from families Haliplidae, Dytiscidae, Hydraenidae, Helophoridae, Hydrophilidae, Scirtidae and Chrysomelidae (Coleoptera) from the North Caucasus, Caucasian Entomological Bulletin 15 (1), pp. 49-53 : 50 50
Hydraena akameku   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 76-77 76-77
Hydraena     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 30 30
Hydraena cameroclandestina   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 13 13
Hydraena reverberata   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 34-35 34-35
Hydraena (Hydraenopsis) guatemala     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 66 66
Hydraena bulgarica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena striolata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 41-42 41-42
Hydraena miniretia   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 17-18 17-18
Hydraena (Hydraenopsis) zetteli   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 17-19 17-19
Hydraena ascensa   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 88-89 88-89
Hydraena textila   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 83-84 83-84
Hydraena (Hydraenopsis) panelephanta   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 47 47
Hydraena affirmata   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 100-102 100-102
Hydraena     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 125-127 125-127
Hydraena (Hydraenopsis) temascaltepecica   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 30 30
Hydraena hynesi     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 39-40 39-40
Hydraena arta   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 149-150 149-150
Hydraena curvosa     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 19 19
Hydraena bispica   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 32-34 32-34
Hydraena (Hydraenopsis) nielshaggei   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 15-17 15-17
Hydraena arachthi     Bilton, David T., 2013, Hydraena lotti sp. nov., a new member of the “ Haenydra ” lineage from the Peloponnese (Greece), with additional records of Hydraena species in the region (Coleoptera, Hydraenidae), Zootaxa 3637 (1), pp. 29-38 : 37 37
Hydraena sebastiani   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 81 81
Hydraena fasciata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 60-61 60-61
Hydraena triloba   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 104-105 104-105
Hydraena (Hydraenopsis)     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 6 6
Hydraena pala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 113-114 113-114
Hydraena sagatai   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 23-24 23-24
Hydraena fundarca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 137-138 137-138
Hydraena cristatigena     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 92-93 92-93
Hydraena anisonycha     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 51 51
Hydraena anisonycha     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 51 51
Hydraena jivaro     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 51 51
Hydraena stellula   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 50-51 50-51
Hydraena inhalista   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 107-108 107-108
Hydraena (Hydraenopsis)     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 59 59
Hydraena (Hydraenopsis) mahensis     Jaech, Manfred A. & Delgado, Juan A., 2016, Hydraena Kugelann, 1794 (Coleoptera, Hydraenidae) from the Seychelles, Indian Ocean, with description of a new species, ZooKeys 623, pp. 75-88 : 76-77 76-77
Hydraena (Monomadraena) bisinuloba     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 30-31 30-31
Hydraena nivalis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena blackburni     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 71-72 71-72
Hydraena (Hydraenopsis)     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 38 38
Hydraena (Hydraenopsis) manguao   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 31-32 31-32
Hydraena (Holcohydraena) occidentalis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 63 63
Hydraena profunda   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 36-38 36-38
Hydraena cameroconvexa   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 26 26
Hydraena camerocontinua   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 25-26 25-26
Hydraena fundacta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 141 141
Hydraena (Hydraenopsis) blancae   sp. nov.  Deler-Hernández, Albert, Fikáček, Martin & Delgado, Juan A., 2017, The Hydraenidae of Cuba (Insecta: Coleoptera) III. Description of two new hygropetric species of Hydraena Kugelann, Zootaxa 4250 (5), pp. 434-446 : 435-439 435-439
Hydraena multimurata   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 22-25 22-25
Hydraena fasciopaca   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 100-101 100-101
Hydraena (Hydraenopsis) saintvincentensis   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 50-52 50-52
Hydraena invicta   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 52 52
Hydraena darwini   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 113 113
Hydraena wattsi   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 121 121
Hydraena koma   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 58 58
Hydraena adelbertensis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 69 69
Hydraena ibalimi   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 68-69 68-69
Hydraena magnetica     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 16-17 16-17
Hydraena beniensis   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 43 43
Hydraena nanoscintilla   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 30 30
Hydraena richardimbi     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena camerocubita   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 15 15
Hydraena (Holcohydraena) circulata     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 62 62
Hydraena discicollis     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 154 154
Hydraena cubista   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 112 112
Hydraena (Hydraena) biltoni     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena (Hydraenopsis) pantanalensis     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena (Hydraenopsis) quadricollis     Ribera, Ignacio, Hernando, Carles & Cieslak, Alexandra, 2019, Aquatic Coleoptera of North Oman, with description of new species of Hydraenidae and Hydrophilidae, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 253-272 : 259 259
Hydraena uniforma   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 29-30 29-30
Hydraena     Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 39-40 39-40
Hydraena cooperi     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 7-11 7-11
Hydraena (Hydraenopsis) belicollis   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 12-15 12-15
Hydraena clavigera     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 31-32 31-32
Hydraena (Hydraenopsis) pernambucana   sp. nov.  Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A. & Hamada, Neusa, 2020, Two new species of Hydraena Kugelann, 1794 from Brazil (Coleoptera: Hydraenidae), Zootaxa 4750 (3), pp. 391-402 : 398-401 398-401
Hydraena insandalia   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 53 53
Hydraena cooperoides   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 11-14 11-14
Hydraena christinae     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 62-63 62-63
Hydraena olidipastoris     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena arcta   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 48-49 48-49
Hydraena rukiyeae   sp. nov.  Lu, Ahmet Kasapo Ġ, Jäch, Manfred A. & Skale, André, 2010, Two new species of Hydraena (s. str.) Kugelann (Coleoptera: Hydraenidae) from northern Turkey, Zootaxa 2353, pp. 62-64 : 62 62
Hydraena (Hydraenopsis) miyatakei     Lee, Dae-Hyun & Ahn, Kee-Jeong, 2016, A taxonomic review of the Hydraenidae in South Korea (Coleoptera), ZooKeys 634, pp. 57-78 : 62-63 62-63
Hydraena supina   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 39-40 39-40
Hydraena spinobesa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 85 85
Hydraena spatula   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 59 59
Hydraena aulaarta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 56 56
Hydraena (Hydraenopsis) comicala   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 52-55 52-55
Hydraena triaequalis   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 77-78 77-78
Hydraena cameroancylis   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 17-18 17-18
Hydraena (Phothydraena) putearius     Ribera, Ignacio, Hernando, Carles & Cieslak, Alexandra, 2019, Aquatic Coleoptera of North Oman, with description of new species of Hydraenidae and Hydrophilidae, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 253-272 : 259 259
Hydraena (Monomadraena) pentarubra     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 95 95
Hydraena (Hydraenopsis) scabra     Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 6-11 6-11
Hydraena cavifrons   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 104 104
Hydraena (Hydraenopsis) belilymba   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 10-12 10-12
Hydraena vadosa   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 47-49 47-49
Hydraena oscillata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 45-46 45-46
Hydraena neblina   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 18-19 18-19
Hydraena capensis   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 14 14
Hydraena bergsteni   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 41-43 41-43
Hydraena genumorpha   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 15-18 15-18
Hydraena impercepta     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 102-104 102-104
Hydraena (Hydraenopsis) josefinae   sp. nov.  Benetti, Cesar J., Valladares, Luis F., Delgado, Juan A. & Hamada, Neusa, 2020, Two new species of Hydraena Kugelann, 1794 from Brazil (Coleoptera: Hydraenidae), Zootaxa 4750 (3), pp. 391-402 : 392-398 392-398
Hydraena camerocrebrata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 14-15 14-15
Hydraena porchi   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 19-20 19-20
Hydraena idema   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 72-73 72-73
Hydraena fasciola   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 39 39
Hydraena franklyni   sp. nov.  DELER-HERNÁNDEZ, ALBERT & DELGADO, JUAN A., 2012, The Hydraenidae of Cuba (Insecta: Coleoptera) I: Contribution to the fauna of eastern Cuba, Zootaxa 3478 (1), pp. 213-238 : 218-220 218-220
Hydraena guadelupensis     DELER-HERNÁNDEZ, ALBERT & DELGADO, JUAN A., 2012, The Hydraenidae of Cuba (Insecta: Coleoptera) I: Contribution to the fauna of eastern Cuba, Zootaxa 3478 (1), pp. 213-238 : 220 220
Hydraena canakcioglui subsp. aydini     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena mpumalanga   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 43 43
Hydraena (Hydraenopsis) pernambucana     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 429 429
Hydraena beyarslani     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 29 29
Hydraena (Spanglerina) ingens     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 70 70
Hydraena mylasae     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena limpidicollis     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 42 42
Hydraena fasciolata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 120-121 120-121
Hydraena (Hydraena) naja   sp. nov.  Ribera, Ignacio, Hernando, Carles & Cieslak, Alexandra, 2019, Aquatic Coleoptera of North Oman, with description of new species of Hydraenidae and Hydrophilidae, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 253-272 : 258-259 258-259
Hydraena (Hydraenopsis) hintoni     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 428 428
Hydraena paeminosa     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 14 14
Hydraena queenslandica   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 107-109 107-109
Hydraena (Hydraenopsis) scintillasolata   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 26-27 26-27
Hydraena breviceps   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 29-30 29-30
Hydraena austrobesa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 88-89 88-89
Hydraena reticulata     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 12-13 12-13
Hydraena cameropalmula   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 21 21
Hydraena (Hydraenopsis) scabra     Freitag, Hendrik, 2013, Hydraena (Hydraenopsis) ateneo, new species (Coleoptera, Hydraenidae) and other aquatic Polyphaga from a small habitat patch in a highly urbanized landscape of Metro Manila, Philippines, ZooKeys 329, pp. 9-21 : 15-16 15-16
Hydraena athertonica   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 77 77
Hydraena elephanta   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 31-34 31-34
Hydraena concepcionica   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 58 58
Hydraena balkei   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 97 97
Hydraena (Hydraenopsis) pontequula     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 68 68
Hydraena evanescens     Audisio, Paolo, Trizzino, Marco, Biase, Alessio De, Mancini, Emiliano & Antonini, Gloria, 2009, A new species of Hydraena (Coleoptera: Hydraenidae) of the H. evanescens complex from Sardinia *, Zootaxa 2318, pp. 281-289 : 282 282
Hydraena paeminosa     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 15 15
Hydraena boliviana   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 15 15
Hydraena (Hydraenopsis) insularis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 67 67
Hydraena (Hydraenopsis) leechi     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 67 67
Hydraena (Hydraena) testacea     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 107 107
Hydraena foliobba   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 40-41 40-41
Hydraena favulosa   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 69-70 69-70
Hydraena koma     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 57 57
Hydraena intensa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 33 33
Hydraena ruinosa     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 116-117 116-117
Hydraena (Hydraenopsis) hosiwergi   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 33-36 33-36
Hydraena (Hydraenopsis) mulanje   sp. nov.  Bilton, David T., 2023, New species and new records of minute moss beetles from East Africa (Coleoptera: Hydraenidae), Acta Entomologica Musei Nationalis Pragae 63 (1), pp. 103-110 : 106-107 106-107
Hydraena     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 6 6
Hydraena ferethula   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 80-81 80-81
Hydraena clarinis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 64-65 64-65
Hydraena (Hydraena) cirratoides     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena (Hydraenopsis) dimorpha     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena (Hydraena) cirrata     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena delvasi     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 50 50
Hydraena huonica   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 52 52
Hydraena guentheri     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 31 31
Hydraena capetribensis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 84-85 84-85
Hydraena     Luna-Luna, Alba Magali, Martins, Caleb Califre, Lopez-Perez, Andres, Ramirez-Ponce, Andres & Contreras-Ramos, Atilano, 2022, Aquatic beetle diversity from Volcan Tacana, Mexico: altitudinal distribution pattern and biogeographical affinity of the fauna, ZooKeys 1111, pp. 301-338 : 301 301
Hydraena picula   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 128-129 128-129
Hydraena (Hydraena) pici     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 107 107
Hydraena dudgeoni     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 113 113
Hydraena bicarinova   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 112-113 112-113
Hydraena incisiva   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 127-128 127-128
Hydraena orcula     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 46 46
Hydraena antaria   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 36-37 36-37
Hydraena scintillabella     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 31 31
Hydraena scintillabella     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 31 31
Hydraena multispina   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 22-23 22-23
Hydraena diffusa   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 66 66
Hydraena (Phothydraena) atrata     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 457 457
Hydraena (Hydraena) bisulcata     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 456 456
Hydraena antsahabe   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 49-51 49-51
Hydraena supersexa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 80-81 80-81
Hydraena inseriata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 81-83 81-83
Hydraena premordica     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 55 55
Hydraena sabella     Pérez-Hernández, Cisteil Xinum, 2017, An annotated catalogue of the Coleoptera types deposited in the National Insect Collection (CNIN) of the National Autonomous University of Mexico, Zootaxa 4288 (1), pp. 1-128 : 49 49
Hydraena (Hydraenopsis) matyoti   sp. n.  Jaech, Manfred A. & Delgado, Juan A., 2016, Hydraena Kugelann, 1794 (Coleoptera, Hydraenidae) from the Seychelles, Indian Ocean, with description of a new species, ZooKeys 623, pp. 75-88 : 77-83 77-83
Hydraena armatura   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 61-63 61-63
Hydraena trinidensis     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 42 42
Hydraena exhalista   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 108-109 108-109
Hydraena pegopyga   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 144-145 144-145
Hydraena camerocarinata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 22 22
Hydraena torquata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 133-134 133-134
Hydraena camerosemicordata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 22-23 22-23
Hydraena neoaccurata   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 56-58 56-58
Hydraena confluenta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 110-111 110-111
Hydraena (Hydraenopsis) dilutipes     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 109 109
Hydraena ambohitantely   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 108-109 108-109
Hydraena nilguenae     Trizzino, Marco, Carnevali, Lucilla, Felici, Stefano De & Audisio, Paolo, 2013, <strong> A revision of <em> Hydraena </ em> species of the “ <em> Haenydra </ em> ” lineage (Coleoptera, Hydraenidae) </ strong>, Zootaxa 3607 (1), pp. 1-173 : 33-34 33-34
Hydraena gnatelloides     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena gracilis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena dentipalpis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena crepidoptera     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena gnatella     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena colchica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena ciliciensis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena cervisophila     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena falcata     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena eucnemis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena emineae     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena marawaka   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 47 47
Hydraena furcula   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 44-45 44-45
Hydraena     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 12 12
Hydraena finniganensis   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 87-88 87-88
Hydraena grandis     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena peru     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 65 65
Hydraena challeti   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 64-65 64-65
Hydraena essentia   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 24-25 24-25
Coleoptera   new species  Vidal, Arielle R., Go, Kimberly Camille T. S. & Freitag, Hendrik, 2017, Hydraenidae (Insecta: Coleoptera) of Mindoro, Philippines. I: Hydraena Kugelann, 1794 of the Baroc River basin, Roxas, Oriental Mindoro with description of three new species., Aquatic insects 38 : -1 -1
Hydraena ulna     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 121 121
Hydraena emineae     Jäch, Ed. A. & Kasapoǧlu, Ahmet, 2006, Hydraena (s. str.) emineae sp. n. from Antalya, southern Turkey (Coleoptera: Hydraenidae), Zootaxa 1133 (1), pp. 39-43 : 39-42 39-42
Hydraena loripes   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 54-55 54-55
Hydraena     Dovgal, Igor & Pešić, Vladimir, 2012, Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region, Zootaxa 3166, pp. 34-40 : 35 35
Hydraena mercuriala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 78-79 78-79
Hydraena (Hydraenopsis) incurva     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena gracilis     PROKIN, Alexander A., LITOVKIN, Stanislav V. & JÄCH, Manfred A., 2015, New records of Hydraenidae and Elmidae (Coleoptera) from Russia and adjacent countries, Fragmenta Faunistica 58 (2), pp. 99-110 : 101 101
Hydraena camerocontrasta   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 9-10 9-10
Hydraena decipiens     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 90-91 90-91
Hydraena accurata     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 51-56 51-56
Hydraena (Hydraena) mouzaiensis     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 106 106
Hydraena (Hydraena) cordata     Lamine, Smail, Lounaci, Abdelkader & Bennas, Nard, 2019, Biodiversity and chorology of aquatic beetles (Coleoptera: Elmidae and Hydraenidae) in Kabylia (central-north Algeria). New records and updates, Zootaxa 4700 (1), pp. 102-116 : 106 106
Hydraena colorata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 59-60 59-60
Hydraena (Dnahydnaedna) punctilata     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 427 427
Hydraena (Hydraenopsis) alterra     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 427 427
Hydraena (Dnahydnaedna) xingu     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 427 427
Hydraena (Hydraenopsis) anaphora     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 427 427
Hydraena fenestella   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 143 143
Hydraena ranarilalatianai   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 141 141
Hydraena upsilonica   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 85-86 85-86
Hydraena cameroovala   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 11-12 11-12
Hydraena buquintana   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 126-127 126-127
Hydraena renalisa   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 124-125 124-125
Hydraena hornabrooki   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 136 136
Hydraena (Hydraenopsis) panbrevis   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 45-47 45-47
Hydraena camerocompacta   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 18 18
Hydraena pluralticola   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 62-63 62-63
Hydraena simplicata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 60-61 60-61
Hydraena (Hydraena) rigua     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 457 457
Hydraena (Hydraenopsis) indica     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena tholasoris   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 135-136 135-136
Hydraena (Hydraena) spp.     Freitag, Hendrik, de Vries, Rick, Paterno, Marta, Maestri, Simone, Delledonne, Massimo, Thompson, Cameron G, Lamed, Helena, Lambert, Rebekah, Fox, Michael F, Gonzalez, Mariela C, Delocado, Emmanuel D, Sabordo, Marc R, Pangantihon, Clister V & Njunjic, Iva, 2021, Hydraena (s. str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus, Biodiversity Data Journal 9, pp. 59892-59892 : 59892 59892
Hydraena     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 13-14 13-14
Hydraena     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 49 49
Hydraena clystera   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 48-49 48-49
Hydraena thumbelipes   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 30-31 30-31
Hydraena okapa     Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 73 73
Hydraena clavicula   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 38-40 38-40
Hydraena camerodidacta   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 27-28 27-28
Hydraena monscassius     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena (Spanglerina) brevis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 69 69
Hydraena (Hydraenopsis) spangleri     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 69 69
Hydraena (Hydraenopsis) sabella     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 69 69
Hydraena bidefensa   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 44-45 44-45
Hydraena (Holcohydraena) angulicollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 61 61
Hydraena (Hydraenopsis) multivillosa   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 20-22 20-22
Hydraena (Hydraenopsis) busuanga   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 36-38 36-38
Hydraena epipleurata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 97-98 97-98
Hydraena (Hydraenopsis) wittmeri     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 562 562
Hydraena cooperi     Bird, Matthew S., Bilton, David T. & Perissinotto, Renzo, 2017, Diversity and distribution of polyphagan water beetles (Coleoptera) in the Lake St Lucia system, South Africa, ZooKeys 656, pp. 51-84 : 79 79
Hydraena incista   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 70-71 70-71
Hydraena tibiodentipes   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 68-69 68-69
Hydraena (Hydraenopsis) quadricollis     Salah, Mohamed, Cueto, Juan Antonio Régil & Valladares, Luis F., 2014, An annotated checklist of the aquatic Polyphaga (Coleoptera) of Egypt I. Family Hydraenidae, Zootaxa 3873 (3), pp. 275-284 : 277 277
Hydraena (Hydraenopsis) plaumanni     Benetti, Cesar J. & Hamada, Neusa, 2022, Annotated checklist of Hydraenidae (Coleoptera, Polyphaga) of Brazil, Zootaxa 5165 (3), pp. 425-434 : 429 429
Hydraena manuloides   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 28 28
Hydraena formosopala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 117 117
Hydraena kakadu   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 82-83 82-83
Hydraena tiara   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 64 64
Hydraena key    Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 5-6 5-6
Hydraena larsoni   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 99-100 99-100
Hydraena camerocompressa   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 18-19 18-19
Hydraena scintillarca   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 29-30 29-30
Hydraena velvetina   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 67-68 67-68
Hydraena grata     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena (Holcohydraena) maureenae     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 62 62
Hydraena cherylbarrae   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 24-25 24-25
Coleoptera   new species  Vidal, Arielle R., Go, Kimberly Camille T. S. & Freitag, Hendrik, 2017, Hydraenidae (Insecta: Coleoptera) of Mindoro, Philippines. I: Hydraena Kugelann, 1794 of the Baroc River basin, Roxas, Oriental Mindoro with description of three new species., Aquatic insects 38 : -1 -1
Hydraena pilulambra   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 25 25
Hydraena owenobesa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 86-87 86-87
Hydraena compacta   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 84-85 84-85
Coleoptera   new species  Vidal, Arielle R., Go, Kimberly Camille T. S. & Freitag, Hendrik, 2017, Hydraenidae (Insecta: Coleoptera) of Mindoro, Philippines. I: Hydraena Kugelann, 1794 of the Baroc River basin, Roxas, Oriental Mindoro with description of three new species., Aquatic insects 38 : -1 -1
Hydraena (Hydraenopsis) d-destina     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 66 66
Hydraena (Hydraenopsis)     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 50 50
Hydraena pisciforma   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 25-27 25-27
Hydraena hamifera     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 95-96 95-96
Hydraena camerodigita   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 28 28
Hydraena camerolatula   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 20 20
Hydraena cameroconfinis   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 19-20 19-20
Hydraena sepikramuensis   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 29 29
Hydraena (Hydraenopsis) hendrichi   sp. nov.  Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 55-62 55-62
Hydraena galea   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 106-107 106-107
Hydraena impercepta     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 62-63 62-63
Hydraena randriamihajai   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 150-151 150-151
Hydraena elementaria   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 151-154 151-154
Hydraena infoveola   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 42-43 42-43
Hydraena impressicollis     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 38-41 38-41
Hydraena millerorum   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 20-21 20-21
Hydraena hintoni   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 21-22 21-22
Hydraena tridisca   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 120 120
Hydraena jivaro     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 51 51
Hydraena (Holcohydraena) nigra     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 63 63
Hydraena castanea     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 28-29 28-29
Hydraena (Hydraenopsis) turneri   sp. nov.  Bilton, David T., 2023, Two new species of Hydraena Kugelann, 1794 from São Tomé Island-an apparent adaptive radiation (Coleoptera, Hydraenidae), Zootaxa 5254 (4), pp. 593-600 : 595-599 595-599
Hydraena decui     DELER-HERNÁNDEZ, ALBERT & DELGADO, JUAN A., 2012, The Hydraenidae of Cuba (Insecta: Coleoptera) I: Contribution to the fauna of eastern Cuba, Zootaxa 3478 (1), pp. 213-238 : 218 218
Hydraena quintana   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 124-125 124-125
Hydraena ollopa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 79 79
Hydraena novacula   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 68-69 68-69
Hydraena buloba   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 105 105
Hydraena fundapta   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 138-139 138-139
Hydraena camerofoveata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 16 16
Hydraena camerocurvata   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 15-16 15-16
Hydraena pectenata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 122-123 122-123
Hydraena pugillista   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 46-47 46-47
Hydraena nomenipes   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 65-68 65-68
Hydraena takutu   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 20-21 20-21
Hydraena tritutela   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 96-97 96-97
Hydraena (Hydraenopsis) claudia   sp. nov.  Freitag, Hendrik & Jäch, Manfred A., 2007, Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925, Zootaxa 1431, pp. 1-44 : 22-24 22-24
Hydraena paganettii     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 34 34
Hydraena goldschmidti   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 56-57 56-57
Hydraena     Dovgal, Igor & Pešić, Vladimir, 2012, Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region, Zootaxa 3166, pp. 34-40 : 37 37
Hydraena koje   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 119 119
Hydraena (Hydraena) kocheri     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 456 456
Hydraena mahavavona   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 65-66 65-66
Hydraena peckorum   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 36-37 36-37
Hydraena colombiana     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 31 31
Hydraena contracolorata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 72-73 72-73
Hydraena (Hydraena) puetzi     Lee, Dae-Hyun & Ahn, Kee-Jeong, 2016, A taxonomic review of the Hydraenidae in South Korea (Coleoptera), ZooKeys 634, pp. 57-78 : 59-61 59-61
Hydraena perpunctata   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 91 91
Hydraena tripartita   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 88-89 88-89
Hydraena reticuloides   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 14-15 14-15
Hydraena umbolenta     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 53 53
Hydraena umbolenta   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 53 53
Hydraena lotti   sp. nov.  Bilton, David T., 2013, Hydraena lotti sp. nov., a new member of the “ Haenydra ” lineage from the Peloponnese (Greece), with additional records of Hydraena species in the region (Coleoptera, Hydraenidae), Zootaxa 3637 (1), pp. 29-38 : 30-37 30-37
Hydraena graciloides     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena tucumanica     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 43 43
Hydraena manulea   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 26-27 26-27
Hydraena rubridentata   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 25-27 25-27
Hydraena (Hydraenopsis) grebennikovi   sp. nov.  Hernando, Carles & Ribera, Ignacio, 2017, Two new terrestrial species of Hydraena Kugelann from the island of Bioko, Gulf of Guinea (Coleoptera: Hydraenidae), Zootaxa 4238 (2), pp. 281-286 : 284-285 284-285
Hydraena sculponea   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 94-95 94-95
Hydraena     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 73 73
Hydraena key    Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 13 13
Hydraena fulgidicollis   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 146-147 146-147
Hydraena (Hydraenopsis) crystallina     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 65 65
Hydraena (Hydraenopsis) colymba     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 65 65
Hydraena (Hydraenopsis) chiapa     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 65 65
Hydraena (Hydraenopsis) canticacollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 65 65
Hydraena tricantha     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 33 33
Hydraena torosopala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 118-119 118-119
Hydraena (Hydraenopsis) limpidicollis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 67 67
Hydraena trichotarsa   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 34-35 34-35
Hydraena muezziginea     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 32 32
Hydraena galatica     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena natiforma   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 27-28 27-28
Hydraena williamsensis     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 23-24 23-24
Hydraena ebriimadli     Ertorun, Nesil, Jäch, Manfred A., Kasapoġlu, Ahmet & Darilmaz, Mustafa C., 2011, Checklist of the Hydraenidae (Coleoptera) of Turkey, with notes on distribution, Zootaxa 3055 (1), pp. 22-42 : 30 30
Hydraena     Ghosh, Joyjit, Saini, Jagdish, Gupta, Devanshu, Ghosh, Sujit Kumar & Chandra, Kailash, 2022, A Catalogue of Indian Hydraenidae (Insecta: Coleoptera), Zootaxa 5087 (4), pp. 558-570 : 561 561
Hydraena bifunda   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 132-133 132-133
Hydraena camerocomplexa   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 13-14 13-14
Hydraena cunicula   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 66-67 66-67
Hydraena fortipes   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 19-20 19-20
Hydraena intraangulata   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 86-87 86-87
Hydraena sinuatipes   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 129 129
Hydraena ypsilon     PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 50-51 50-51
Hydraena clinodorsa   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 32-33 32-33
Hydraena maculopala   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 114-115 114-115
Hydraena duodecimata   sp. nov.  PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 76 76
Hydraena monikae     PERKINS, PHILIP D., 2014, A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae), Zootaxa 3758 (1), pp. 1-92 : 75-76 75-76
Hydraena dilutipoides   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 112-115 112-115
Hydraena (Phothydraena) testacea     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 458 458
Hydraena (Phothydraena) hernandoi     Benamar, Loubna, Bennas, Nard, Hassoun, Mustapha & Millán, Andrés, 2022, Checklist of Moroccan aquatic beetles (Coleoptera: Hydraenidae Mulsant, 1844) New records and updates, Zootaxa 5129 (4), pp. 451-504 : 458 458
Hydraena tarsotricha   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 50-51 50-51
Hydraena cultrata   sp. nov.  PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 102-103 102-103
Hydraena parvispinosa   sp. nov.  Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 76-77 76-77
Hydraena (Hydraenopsis) canalula   sp. nov.  Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 15-17 15-17
Hydraena mintrita   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 27 27
Hydraena (Hydraenopsis) yangae   sp. nov.  Jäch, Manfred A., Díaz, Juan A. & Skale, Andre, 2013, The Hydraenidae (Coleoptera) Of The Republic Of Singapore, Raffles Bulletin of Zoology 61 (1), pp. 53-71 : 68-70 68-70
Hydraena brahman   sp. nov.  Perkins, Philip D., 2011, New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944, Zootaxa 2944 (1), pp. 1-417 : 82-83 82-83
Hydraena cochabamba   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 62-63 62-63
Hydraena ampla     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 60 60
Hydraena pedroaguilerai   sp. nov.  Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 40-41 40-41
Hydraena (Holcohydraena) ancylis     Perkins, Philip D., 2023, New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae), Zootaxa 5367 (1), pp. 1-86 : 61 61
Hydraena     Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 16-17 16-17
Hydraena     Dovgal, Igor & Pešić, Vladimir, 2012, Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region, Zootaxa 3166, pp. 34-40 : 35-37 35-37
Hydraena scintillutea     Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 31 31
Hydraena camerobuloba   sp. nov.  Perkins, Philip D., 2022, Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae), Zootaxa 5203 (1), pp. 1-66 : 24 24

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