Taxonomy of Peruvian water beetles in the genus Hydrochus Leach, 1817 (Coleoptera: Hydrochidae) Author Perkins, Philip D. text Zootaxa 2020 2020-10-23 4868 1 61 89 journal article 8896 10.11646/zootaxa.4868.1.4 cfd5c06e-06f0-4f1f-ae4b-40b7b46f44a3 1175-5326 4417281 DC4B8EC5-CBDA-49D2-B370-381C96AF3A10 Hydrochus richteri Bruch Hydrochus richteri Bruch, 1915: 463 ; Oliva (1992) lectotype designation Hydrochus soesilaae Makhan, 1994 ; syn. Oliva (1996) Originally described from Argentina . This species is also recorded from Paraguay ( Oliva 1996 ); however, this needs confirmation as there is a synonymy dispute between Oliva (1996) and Makhan (1998) . Two records from Peru are given below. Material examined (32): PERU : Loreto , 15km from Ucayali on R. Calleria , Colonia Calleria, 10–20.xi.1961 , leg. B. Malkin (1 NMNH ); Pucallpa, Lago Yarina Cocha , 11.iv.1969 , leg. P. & P. Spangler (31 NMNH ) .