Subgenus (Moelleria) J. G. Jeffreys, 1865
(5-4-1-3-2-12-3-8-1-0-0-0-0)

costulata (H. P. C. Moller, 1842) [T]
(5-4-1-3-2-12-3-8-1-1-0-0-0)
Ribbed Moelleria
Ref. Abbott, 1974 p 61 bw
Amer. Fish. Soc., 1988 p 57

drusiana W. H. Dall, 1919
(5-4-1-3-2-12-3-8-1-2-0-0-0)
Ref. Abbott, 1974 p 61

quadrae W. H. Dall, 1897
(5-4-1-3-2-12-3-8-1-3-0-0-0)
Ref. Abbott, 1974 p 61