Hydrogamasus antarcticus Trägårdh, 1907: 12.
Gamasellus (Hydrogamasellus) antarcticus.— Hirschmann, 1966b: 7; Watson, 1967: 41; Hunter, 1970: 61.
Hydrogamasus antarcticus.— Hunter, 1967a: 35; 1967b: 31.
Hydrogamasellus antarcticus.— Lee, 1970: 115; Lee & Hunter, 1974: 316; Karg, 1976b: 53; 1997a: 65; Karg & Schorlemmer, 2009: 82; Santos et al., 2013: 87.
Type depository. Naturhistorika Riksmuseum, Stockholm, Sweden.
Type locality and habitat. Paulet Island, Antarctic Peninsula, 15 January 1902, in wet moss.
Note. Specimens reported by Womersley (1937: 17) as Hydrogamasus antarcticus were later described as Parasitiphis aurora Lee, 1970: 123. We have examined a syntype female of H. antarcticus (from the Stockholm Museum), as well as specimens of this species from Macquarie Island (in ANIC). In both cases the insemination pore is located on the posterodistal face of coxa III, and opens into a short sclerotised basal section of the spermathecal duct within coxa III. This information has been incorporated into the genus concept for Hydrogamasellus. Some of the specimens in Trägårdh's syntype series were misidentified, and actually belong to Hydrogamasellus racovitzai (Trouessart, 1903). This error was noted on the specimen labels by D. C. Lee when he examined these specimens in 1966.