Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae) Author Perkins, Philip D. text Zootaxa 2021 2021-06-28 4994 1 1 93 journal article 10.11646/zootaxa.4994.1.1 1175-5326 5043261 107FCA64-345F-40A4-99D3-5C1441EEAD93 Hydrochus soekhnandanae Makhan Figs. 4 , 71 Hydrochus soekhnandanae Makhan 1992: 98 Hydrochus pupillus Orchymont : Oliva (1996: 331) ; incorrect synonymy by Oliva (1996) ; Perkins 2019c Originally described from Suriname . Additional locality and deposition data also published for Venezuela ( Perkins, 2019c ) and Panama ( Perkins, 2021 ). Habitus and male genitalia images are given in Perkins (2019c) . New locality and deposition data for Brazil and Paraguay are given below. Material examined (14): Brazil : Bahia , 15km . E. Itabuna , 3.vii.1969 , leg. P. & P. Spangler (1 NMNH ) ; Morro do Chapéu , Barragem de Angelim on BA-422, E of Ventura -11.65164 -40.95309 , 706m , 24.ii.2018 , reservoir by road, lots of vegetation, Benetti & Team, BR 18-0224-04B (9 INPA , SEMC ) . Paraguay : Alto Parana , Estancia Dimas , ( 25°33’S , 55°13’W ), 24–25.xi.2004 , leg. U. Drechsel (1 NMW ) ; same locality, 17–22.ii.2005 , leg. U. Drechsel (3 NMW ) . Remarks. The male genitalia of H. soekhnandanae and H. pupillus distinctively differ. Refer to the images of H. soekhnandanae in Perkins (2019c) and H. pupillus herein ( Fig. 50 ).