Gamasellus crozetensis Richters, 1907: 279.
Cyrtolaelaps (Gamasellus) crozetensis.— Ryke, 1962a: 51.
Hydrogamasellus richtersi Lee, 1970: 115 [unnecessary replacement name for Gamasellus crozetensis Richters, 1907].
Hydrogamasellus crozetensis.— Lee & Hunter, 1974: 316; Santos et al., 2013: 87.
Hydrogamasellus richtersi.— Karg, 1976b: 52; 1997a: 65; 1998: 192; Karg & Schorlemmer, 2009: 82.
Type depository. According to Lee (1970), specimen probably destroyed. Type locality and habitat. Île de la Possession, Crozet Islands, on moss.