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 purpureus Knisch Figs. 5 , 54 , 70 Hydrochus purpureus Knisch 1920: 57 Originally described from Brazil . Additional locality and deposition records have been published for Venezuela ( Perkins, 2019c ). Habitus and male genitalia images are given in Perkins (2019a , 2019c ). The following new locality records are from Bolivia and Brazil Material examined (12): Bolivia : Beni , Beni Stn., Palm Camp, NE . of San Borja , 1.viii.1988 , leg. Robert W. Brooks (1 SEMC ) . Brazil : Mato Grosso , Rio Bento Gomes (Pantanal); Flussabschnitt bei Periquito , ( 15°54’S , 56°33’W ), 1.i.1993 – 30.xii.1994 , leg. E. Stuhr (30) (11 NMW ) .