Genus Cyclomactra W. H. Dall, 1895
(3-4-4-0-21-3-2-18-0-0-0-0-0) Ref. Vokes, 1980 p 135 [see also as Subgenus under Genus Mactra] ovata (3-4-4-0-21-3-2-18-0-1-0-0-0) Oval Trough Shell Ref. Penniket, 1970 p 100 c
(3-4-4-0-21-3-2-18-0-0-0-0-0) Ref. Vokes, 1980 p 135 [see also as Subgenus under Genus Mactra]
ovata (3-4-4-0-21-3-2-18-0-1-0-0-0) Oval Trough Shell Ref. Penniket, 1970 p 100 c