Bathygyge Hansen, 1897
DIAGNOSIS (after Markham, 1985a): Female: Body subcircular. Coxal plates large; oostegites about half covering marsupium. Small pleon sharply rotated, of six distinct separated pleomeres, lacking lateral plates, pleopods and uropods biramous.
Male: All pereomeres distinct. Propodus of each pereopod produced into ventrodistal projection receiving tip of dactylus. Pleon fused, ovate, bulbous, about 1/4 total body length, lacking appendages and most traces of segmentation.
TYPE SPECIES: Bathygyge grandis Hansen, 1897, by monotypy.
OTHER SPECIES: None.