Caecognathia antarctica (Studer, 1884)
Caecognathia calva (Vanhöffen, 1914)
Caecognathia hodgsoni (Vanhöffen, 1914)
Caecognathia polaris (Hodgson, 1902)
Caecognathia stygia (G. O. Sars, 1877)
Caecognathia wagneri (Monod, 1925)
Euneognathia gigas (Beddard, 1886)
Gnathia antarctica (Studer, 1884) accepted as Caecognathia antarctica (Studer, 1884)
Gnathia calva Vanhöffen, 1914 accepted as Caecognathia calva (Vanhöffen, 1914)
Gnathia fragilis Schultz, 1977
Gnathia hodgsoni Vanhöffen, 1914 accepted as Caecognathia hodgsoni (Vanhöffen, 1914)
Gnathia polaris Hodgson, 1902 accepted as Caecognathia polaris (Hodgson, 1902)
Gnathia stygia (G. O. Sars, 1877) accepted as Caecognathia stygia (G. O. Sars, 1877)
Gnathia tuberculosa (Beddard, 1886)
Gnathia wagneri Monod, 1925 accepted as Caecognathia wagneri (Monod, 1925)