Genus Stephanauge Verrill, 1899

Diagnosis (adapted from Carlgren 1949, modifications on bold): Amphianthidae with well-developed base often elongate in the transversal axis, often attached to gorgonians, sponges or worm-tubes. Column rather low, smooth or with longitudinal rows of mesogleal papillae in its distal part. Cinclides, if present, few, occurring only over the directive chambers. Sphincter well developed, mesogleal. Tentacles possibly more numerous than the mesenteries at the base or the same number; fairly short, with or without mesogleal thickenings at the base on their outer sides. Longitudinal muscles of tentacles ectodermal. Radial muscles of oral disc ectodermal to ecto-mesogleal. Two distinct siphonoglyphs. Perfect pairs of mesenteries 6–12. Retractors and parietobasilar muscles weak. Gonads on all stronger mesenteries except possibly the directives. Acontia few or perhaps sometimes absent. Cnidom: spirocysts, basitrichs, p -mastigophores B1.

Type species: Actinia abyssicola Moseley, 1877

Valid species: Stephanauge abyssicola (Moseley, 1877); S. acanellae (Verrill, 1883); S. annularis Carlgren, 1936; S. bulbosa Carlgren, 1928; S. hyalonematis (McMurrich, 1893); S. impedita (Gravier, 1918); S. inornata (Gravier, 1918); S. nexilis (Verrill, 1883); S. ovata (Wassilieff, 1908); S. spongicola (Verrill, 1883); S. tuberculata (Hertwig, 1882) .