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 tarsalis Chevrolat Figs. 5 , 64 Hydrochus tarsalis Chevrolat 1863: 207 Hydrochus metallipes Knisch 1920 ; synonymy Perkins (2019a) Originally described from Cuba .Additional locality data records have been published for Venezuela ( Perkins 2019c ). Habitus and male genitalia images are given in Perkins (2019a , c). The following new locality and deposition data records are from Bolivia , Brazil and Paraguay . Material examined (101): Bolivia : Beni , 1.7 km E of San Borja , ( 14°52’7’’S , 66°43’53’’W ), 15.vii.1998 , leg. K. B. Miller (13 SEMC ) ; 40 km E. San Borja, Estacion Biologica Beni , Palm Camp at Rio Curiraba , ( 14°44’S , 66°40’W ), 13.ix.1987 , leg. W. E. Steiner (1 NMNH ) ; 7 km SW Trinidad , elev. 163 m ( 14°52’12’’S , 64°57’32’’W ), 18.vii.1998 , leg. K. B. Miller (2 SEMC ) ; Beni Stn. , Palm Camp, NE . of San Borja , 6–9.viii.1988 , leg. Robert W. Brooks (3 SEMC ) ; Cercado Province , 9.5 km N of Trinidad , ( 14°46’34’’S , 64°58’0’’W ), 17.vi.1999 , leg. K. B. Mill- er (5 SEMC ) ; Magdalena , El Portero , ca. 155 m a.s.l. , elev. 155 m ( 13°9’7.27’’S , 64°1’28.56’’E ), 18.vii.2004 , leg. A. Megroz (4 NMW ) ; Santa Cruz , Ayacucho , 13–14.v.1969 , leg. P. & P. Spangler (1 CAS , 1 NMNH ) ; Potrerillos del Guenda , Preserva Natural , elev. 370 m ( 17°40’S , 63°27’W ), 1–4.x.2007 , leg. Wappes & Morris (2 SEMC ) ; same locality, 17–22.x.2007 , leg. J. & F. Romero (2 SEMC ) ; Santa Cruz , 11–12.v.1969 , leg. P. & P. Spangler (1 CAS , 2 NMNH ) . Brazil : Mato Grosso , Corumba , ( 17°32’S , 56°27’W ), 21–23.ii.1954 , leg. Gans & Pereira (20 NMNH ) ; Salobra , 1–30.i.1955 , leg. F. Lane (3 NMNH ) ; Mato Grosso do Sul , Corumbá , Base de Estudos do Pantanal , c. 4 km N on MS-184 ( -19.54081 -57.03975 ), 92m , 23.vi.2018 , Marshy /gravely area with vegetation, leg. Hamada and team, BR18-0623-01A (1 INPA ) ; Mato Grosso do Sul , Corumbá , Base de Estudos do Pantanal ( -19.57708 - 57.01912 ), 97m , 22–24.vi.2018 , Pools and marsh area around station buildings, leg. Hamada and team, BR18-0622- 04B (1 SEMC ) ; Mato Grosso do Sul , Corumbá , (c. 29 km SE) on BR-262 ( -19.3062 -57.60382 ), 25.vi.2018 , Drying marsh with abundant vegetation and detritus, leg. Hamada and team, BR18-0625-02A (1 SEMC ) . Paraguay : Dep. Central , Asuncion , 9.i.1992 , leg. U. Drechsel (3 NMW ) ; Dep. Pte. Hayes , Puerto Galileo , ( 25°8’S , 57°50’W ), 27–29.viii.2005 , leg. U. Drechsel (35 NMW ) .