Subgenus (Ctenoides) O. A. L. Morch, 1853

(3-7-4-0-1-1-0-31-2-0-0-0-0)
Ref. Abbott, 1974 p 453
[see also as Genus]

scabra (I. Born, 1778) [T]
(3-7-4-0-1-1-0-31-2-1-0-0-0)
Rough Fileclam, Rough Lima
Ref. Abbott, 1974 p 453 c
Abbott & Dance, 1982 p 319 c
Amer. Fish. Soc., 1988 p 26

Form glacialis J. F. Gmelin, 1791
(3-7-4-0-1-1-0-31-2-1-0-1-0)
Rough Lima
Syn. Lima (Lima) tenera G. B. Sowerby, 1843, not W. H. Turton, 1822
Ref. Abbott & Dance, 1982 p 319 c

Form tenera G. B. Sowerby, 1843, not W. H. Turton, 1822
(3-7-4-0-1-1-0-31-2-1-0-2-0)
Ref. Abbott, 1974 p 453 c