| Family | Genus | Species | Authority | Distribution | References |
| Gnathiidae | Caecognathia | anatarctica | Studer 1884 | Continental | Schotte et al., 1995 |
| Gnathiidae | Caecognathia | vanhoeffeni | (Menzies 1962) | Continental | Menzies, 1962 |
| Gnathiidae | Gnathia | incana | Menzies & George 1972 | Deep-sea | Schotte et al., 1995 |
| Gnathiidae | Gnathia | lacunacapitalis | Menzies & George 1972 | Deep-sea | Schotte et al., 1995 |
References
Menzies, R.J. (1962) The zoogeography, ecology and systematics of the Chilean marine isopods. Reports of the Lund University Chile expedition 1948-49, 42. C.W.K. Gleerup, Lund, Sweden. 162 pp.
Schotte, M., Kensley, B.F. & Shilling, S. (1995 onwards). World list of Marine, Freshwater and Terrestrial Crustacea Isopoda. National Museum of Natural History Smithsonian Institution: Washington D.C., USA. [http://invertebrates.si.edu/isopod/] (Consulted January 2008)