Catalogue of the family Ologamasidae Ryke (Acari: Mesostigmata) Author Castilho, Raphael C. Author Silva, Edmilson S. Author De, Gilberto J. Author Halliday, Bruce text Zootaxa 2016 4197 1 1 147 journal article 10.5281/zenodo.168445 449eccf3-b63f-437d-945f-85c5e01dadb2 1175-5326 168445 Genus Hydrogamasus Berlese, 1892 Hydrogamasus Berlese, 1892c : 5 . Hydrogamasus .— Vitzthum, 1931a : 142 ; 1943: 756; Baker & Wharton, 1952 : 73 ; Ryke, 1962b : 160 ; Hirschmann, 1966b : 7 ; Lee, 1970 : 64 . Hydrogamasus ( Hydrogamasus ).— Hirschmann, 1966b : 10 . Type species: Gamasus littoralis G. & R. Canestrini, 1881 , by subsequent designation ( Berlese, 1903a ). Berlese (1892c) described the genus Hydrogamasus to include two species, Gamasus littoralis G. & R. Canestrini, 1881 and H . giardi ( Berlese & Trouessart, 1889 ) . Berlese (1903a) then designated G . littoralis as the type species of Hydrogamasus . However, Oudemans (1902b) felt that G . littoralis was a junior synonym of G . salinus Laboulbene, 1851 . Vitzthum (1943) , Baker & Wharton (1952) , and Ryke (1962b) also said that G . littoralis is a junior synonym of G . salinus . Lee (1970) then found that G . littoralis is not a synonym of G . salinus . He placed G . littoralis in the Ologamasidae as the type species of Hydrogamasus , and G . salinus in Pergamasus ( Parasitidae ). Oudemans (1936, page 163) also found that G . salinus was correctly placed in Pergamasus . The type species of Hydrogamasus is therefore Gamasus littoralis , as originally designated by Berlese (1903a) .