Hydaticus lateralis Laporte, 1835: 97 Aubé 1838: 189 Sharp 1882a: 780 Branden 1885: 101 Zimmermann 1920a: 221 Blackwelder 1944: 79 Trémouilles 1996: 28 Benetti & Hamada 2003: 704 Nilsson & Hájek 2019: 94 Hydaticus amazonicus Sharp 1882a: 655 Sharp 1887: 758 Branden 1885: 103 Trémouilles 1996: 28 A review of Peruvian diving beetles of the genus Hydaticus Leach, 1817, with description of Hydaticus (Prodaticus) panguana sp. nov. and notes on other Neotropical species (Coleoptera: Dytiscidae) Megna, Yoandri S. Balke, Michael Apenborn, Rico Hendrich, Lars Zootaxa 2019 2019-06-12 4615 1 113 130 7VG65 Laporte, 1835 Laporte 1835 [151,561,1379,1406] Insecta Dytiscidae Hydaticus Animalia Coleoptera 3 116 Arthropoda species lateralis  ( Figs 2B, 5, 8, 9A, 9B)     Hydaticus lateralisLaporte, 1835: 97;  Aubé 1838: 189;  Sharp 1882a: 780;  Branden 1885: 101;  Zimmermann 1920a: 221;  Blackwelder 1944: 79;  Trémouilles 1996: 28;  Benetti & Hamada 2003: 704;  Nilsson & Hájek 2019: 94.     Hydaticus amazonicus Sharp 1882a: 655;  Sharp 1887: 758;  Branden 1885: 103; synonymy by  Trémouilles 1996: 28.     Typelocality. French Guiana, Cayenne.  Material examined.   VENEZUELA: “ Venezuela, Caripito, 4.V. &  9.VIII.1942, New York Zoo. Soc. Dept. Tropical Research”, 2 exs., ( CGW, AMNH).   GUYANA: “ Guyana, Bartica, New York Zoo. Soc. Dept. Tropical Research”, 1 ex., ( AMNH).   SURINAME: “ Surinam, Tafelberg Distr., Saramacca Camp2, 13 km NW of air strip,  20.VI.1979, leg. M.S. Hoogmoed”, 1 ex., ( CGW).   PERU: “ Peru, Huánuco Department, Yuyapichis, Stat. Panguana, 20.9.-  7.10.2013, - 9.616667S, - 74.9333W, Bäche, Burmeisterleg.”, 1 ex., ( ZSM); “ Peru/ Amazonia Prov. Huánuco Río Yuyapichis, Panguana,  VII.1982 Palmensumpfleg. E.G. Burmeister”, 1 ex., ( ZSM); “ Peru, Dept. Huánuco PanguanaACP, Río Yuyapichis,  230m, 9°37ʹS 74°56ʹW, 28.09.-  06.10.2000, leg. E.G. Burmeister”, 3 exs., ( MUSM, ZSM); “ Peru, Huánuco Department, Panguana, Yuyapichis river,  25.vii.2013, - 9.616667S, - 74.9333W, R. Apenbornleg.”, 7 exs., ( MUSM, ZSM).   Diagnosis.TL = 12.9–13.8 mm; TL-H = 12.2–13.1 mm; MW = 6.8–7.2 mm; pronotum black with lateral margins testaceous; elytron with basal fasciae not confluent with sublateral, longitudinal and yellowish stripes; elytron with sublateral stripes extended to the mid length of elytra, with a subtriangular, postmedial and broad spot ( Fig. 2B); protarsomere I with a series of spines across the dorsal surface; metatibia with bifid setae curved ventro-basally on posterior surface; median lobe of aedeagus with apex rounded in lateral view ( Fig. 5).  Differential diagnosis.  Hydaticus lateralishas the colour pattern of the pronotum and the elytra similar to  H. devexusand  H. tuyuensis, but can be distinguished from those species by the following combination of characters: elytron with transverse and subbasal yellowish fasciae, often with sublateral, longitudinal and yellowish stripe; elytron with basal and sublateral yellowish stripes not connected, and with a postmedial and broad spot.   Distribution.Prior to this study,  Hydaticus lateralishad been recorded from Braziland French Guiana only (Laporte 1835; Trémouilles 1996). Its range of distribution is now extended to Guyana, Venezuela, Suriname, and Peru( Fig. 8).   Ecology. Trémouilles (1996)and Benetti & Hamada (2003)reported this species from lowland areas in Brazil. In Panguana,  H. lateraliswas collected in shaded and shallow rest pools of forest streams and temporary forest pools, packed with decaying leaves and wood ( Fig. 9A, 9B).  Hydaticus lateralisis sympatric and sometimes syntopic with  H. panguana  sp. nov.and  H. subfasciatus. The species is also attracted to light. 2847257368 [151,598,1614,1642] French Guiana Cayenne 3 116 1 holotype 2847257343 1942-08-09 CGW, AMNH Venezuela Caripito Venezuela 3 116 2 2847257325 AMNH Guyana Bartica Guyana 3 116 1 2847257317 1979-06-20 CGW M. S. Hoogmoed Suriname Surinam Camp Tafelberg Distr. 3 116 1 Saramacca 2847257320 2013-07-10 ZSM Bache & Burmeister Peru Peru -9.616667 Yuyapichis 5 -74.9333 Department 3 116 1 Huanuco 2847257374 1982-07 ZSM Palmensumpf Peru Peru Rio Yuyapichis Amazonia Prov. 3 116 1 Huanuco 2847257309 2000-06-10 MUSM, ZSM E. G. Burmeister Peru Peru 230 -9.616667 Panguana 1299 -74.933334 Dept. 3 116 3 Huanuco 2847257353 2013-07-25 MUSM, ZSM R. Apenborn Peru Peru -9.616667 Panguana 5 -74.9333 Department 3 116 7 Huanuco