Janssen, Taxa Only, Exact Match: 9 Treatments

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Melanopsis (Stilospirula) jansseni     Neubauer, Thomas A., 2016, A nomenclator of extant and fossil taxa of the Melanopsidae (Gastropoda, Cerithioidea), ZooKeys 602, pp. 1-358: 139 139
Neogastropoda   new species  Harzhauser, Mathias & Kowalke, Thorsten, 2004, Survey of the nassarid gastropods in the Neogene Paratethys (Mollusca: Caenogastropoda: Buccinoidea), Archiv für Molluskenkunde 133, No. 1, pp. 1-61: 11 11
Coleoptera     Keller, Oliver, Schnepp, Kyle E., Ashman, Krystal L., Turnbow, Robert H. & Skelley, Paul E., 2020, An annotated catalog of the type material of Adephaga and Myxophaga (Coleoptera) deposited in the Florida State Collection of Arthropods in Gainesville, Florida, United States of America, Zootaxa 4744 (1), pp. 1-118: 19 19
Pteris janssenii   sp. nov.  Rakotondrainibe, France & Jouy, Alain, 2016, Nouveautés taxonomiques et nomenclaturales dans le genre Pteris L. (Pteridaceae) à Madagascar, Adansonia 38 (1), pp. 15-28: 16-17 16-17
Scarabaeus janssensi     Bezděk, Aleš & Hájek, Jiří, 2013, Catalogue of type specimens of beetles (Coleoptera) deposited in the National Museum, Prague, Czech Republic, Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 387-442: 434 434
Scatonomus janssensi     Valois, Marcely C., Vaz-de-Mello, Fernando Z. & Silva, Fernando A. B., 2020, A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae), Journal of Natural History 54 (17 - 18), pp. 1081-1114: 1102 1102
Scatonomus janssensi     Valois, Marcely C., Vaz-de-Mello, Fernando Z. & Silva, Fernando A. B., 2020, A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae), Journal of Natural History 54 (17 - 18), pp. 1081-1114: 1102 1102
Metacatharsius janssensi   comb. nov.  Frolov, Andrey V., 2014, Revision of the genus Delopleurus Boheman (Coleoptera: Scarabaeidae: Scarabaeinae) with description of new species from Africa, Journal of Natural History 49 (3), pp. 129-154: 152-153 152-153
Stenognathriopes (Tenentiella) janssensi   sp. nov.  Zeppelini, Douglas & Silva, Diego Dias Da, 2012, A new Stenognathriopes (Collembola, Symphypleona, Bourletiellidae) from Brazilian coast, Zootaxa 3540, pp. 51-58: 52-57 52-57