Subgenus (Callithaca) W. H. Dall, 1902

(3-4-4-0-26-7-1-57-2-0-0-0-0)
Ref. Abbott, 1974 p 526
Bernard, 1983 p 52
Syn. (Gallithaca) E. Fischer-Piette & Vukadinovic, 1977 ?
Ref. Vaught, 1989 p 135
[see also as Genus]

restorationensis D. L. Frizzell, 1930
(3-4-4-0-26-7-1-57-2-1-0-0-0)
[may be a hybrid between tenerrima and staminea]
Ref. Abbott, 1974 p 526

staminea (T. A. Conrad, 1837)
(3-4-4-0-26-7-1-57-2-2-0-0-0)
Common Pacific Littleneck, Pacific Littleneck
Ref. Abbott & Dance, 1982 p 368 c
Amer. Fish. Soc., 1988 p 45
Syn. Protothaca (Protothaca) orbella (P. P. Carpenter, 1864)
Ref. Abbott, 1974 p 526 bw

Form laciniata (P. P. Carpenter, 1864)
(3-4-4-0-26-7-1-57-2-2-0-1-0)
[may be a variety]
Syn. Protothaca (Protothaca) spatiosa W. H. Dall, 1916
Ref. Abbott, 1974 p 526

Form ruderata (G. P. Deshayes, 1853)
(3-4-4-0-26-7-1-57-2-2-0-2-0)
[may be a variety]
Ref. Abbott, 1974 p 526

tenerrima (P. P. Carpenter, 1856)+[(1857)] [T]
(3-4-4-0-26-7-1-57-2-3-0-0-0)
Thin-shell Littleneck, Thin-shelled Littleneck
Ref. Abbott, 1974 p 526 bw
Abbott & Dance, 1982 p 368 c
Amer. Fish. Soc., 1988 p 45
Syn. Paphia (Callithaca) tenerrima alta L. N. Waterfall, 1929;
Paphia (Callithaca) restorationensis D. L. Frizzel, 1930;
Tapes (Tapes) tenerrima P. P. Carpenter, 1857;
Venus (Venus) rigida authors [not L. W. Dillwyn, 1817, nor A. A. Gould, 1850]
Ref. Bernard, 1983 p 52