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 zicsii Makhan , new status Figs. 1 , 35 Hydrochus zicsii Makhan 1993: 69 Hydrochus jenniferiduae Makhan 1995: 192 ; incorrect synonymy by Oliva (1996) Originally described from Bolivia . Only the holotype ( HNHM ) and one specimen from Brazil have been seen during this study . Material examined: Brazil : Mato Grosso , Jacaré , 1–30.xi.1965 , leg. M. Alvarenga (1 NMNH ) . Remarks. I have examined the holotypes , including the male genitalia, of H. jenniferiduae (NMW) , and H. zicsii (HMNH) and conclude without doubt that they represent different species. The specimen imaged ( Fig. 35 ) is the holotype .