Medium-sized to fairly large, solitary Corallimorphidae with usually low body and broad oral disc. Tentacles provided at their ends with well developed acrospheres, divisible into discal and marginal tentacles. Usually only one into discal and one marginal tentacle arising from one and the same endocoel. Exceptionally a doubling of the discal tentacles may take place over the oldest endocoels. Body-wall thick, usually cartilaginous, with more or less distinct longitudinal muscles. No sphincter. Arrangement of the mesenteries hexamerous but often irregular in the youngest cycles. 2 pairs of directives (always?). Muscles of mesenteries weak. Always solitary. Cnidom: spirocysts, holotrichs, microbasic p- and b-mastigophors.
C. profundus Moseley 1877
C. ingens Gravier 1918
C. atlanticus Carlgren 1934 [sic]
C. antarcticus Carlgren and Stephenson 1929
C. rigidus Moseley 1877
C. obtectus Hertwig 1888
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1