Subgenus (Protothaca) W. H. Dall, 1902

(3-4-4-0-26-7-1-57-11-0-0-0-0)
Ref. Bernard, 1983 p 52

discors G. B. Sowerby, 1835
(3-4-4-0-26-7-1-57-11-1-0-0-0)
[=Protothaca (Tropithaca) grata (T. Say, 1830)]
Ref. Abbott, 1974 p 526

dombeii J. B. P. A. de Lamarck, 1818
(3-4-4-0-26-7-1-57-11-2-0-0-0)
[=Protothaca (Protothaca) thaca (G. I. Molina, 1782)]
Ref. Abbott & Dance, 1982 p 367

fuscolineata G. B. Sowerby, 1835
(3-4-4-0-26-7-1-57-11-3-0-0-0)
[=Protothaca (Tropithaca) grata (T. Say, 1830)]
Ref. Abbott, 1974 p 526

grewingkii W. H. Dall, 1904
(3-4-4-0-26-7-1-57-11-4-0-0-0)
[=Protothaca (Protothaca) staminea (T. A. Conrad, 1837)]
Ref. Bernard, 1983 p 52

laciniata (P. P. Carpenter, 1864)
(3-4-4-0-26-7-1-57-11-5-0-0-0)
Fringed Littleneck
Ref. Amer. Fish. Soc., 1988 p 44
Syn. Tapes (Tapes) laciniata P. P. Carpenter, 1864
Ref. Bernard, 1983 p 52

orbella (P. P. Carpenter, 1864)
(3-4-4-0-26-7-1-57-11-6-0-0-0)
[=Protothaca (Callithaca) staminea (T. A. Conrad, 1837)]
Ref. Abbott, 1974 p 526

spatiosa W. H. Dall, 1916
(3-4-4-0-26-7-1-57-11-7-0-0-0)
[=Protothaca (Callithaca) staminea Form laciniata (P. P. Carpenter, 1864)]
Ref. Abbott, 1974 p 526

staminea (T. A. Conrad, 1837)
(3-4-4-0-26-7-1-57-11-8-0-0-0)
Common Pacific Littleneck
Ref. Abbott & Dance, 1982 p 368 c
Syn. Chione (Chione) ruderata G. P. Deshayes, 1853;
Leukoma conradi E. Romer, 1867;
Paphia (Paphia) staminea orbella P. P. Carpenter, 1864;
Paphia (Paphia) staminea spatiosa W. H. Dall, 1916;
Paphia (Protothaca) staminea sulculosa W. H. Dall, 1902;
Protothaca (Protothaca)grewingkii W. H. Dall, 1904;
Tapes (Tapes) diversa G. B. Sowerby, 1855;
Tapes (Tapes) tumida ex T. A. Conrad, ms, P. P. Carpenter, 1856 [not G. B. Sowerby, 1858];
Venerupis (Venerupis) petittii G. P. Deshayes, 1839;
Venus (Venus) ampliata ex A. A. Gould, ms, P. P. Carpenter, 1857;
Venus (Venus) dispar ex A. A. Gould, ms, P. P. Carpenter, 1857;
Venus (Venus) mundulus L. A. Reeve, 1863;
Venus (Venus) pectunculoides A. Valenciennes in A. Petit- Thouars, 1846;
Venus (Venus) rigida A. A. Gould, 1850 [not L. W. Dillwyn, 1811];
Venus (Venus) staminea T. A. Conrad, 1837
Ref. Bernard, 1983 p 52

thaca (G. I. Molina, 1782) [T]
(3-4-4-0-26-7-1-57-11-9-0-0-0)
Thaca Venus
Syn. Chama thaca G. I. Molina, 1782
Ref. Abbott, 1974 p 526
Keen, 1971 p 192
Syn. Protothaca (Protothaca) dombeii J. B. P. A. de Lamarck, 1818
Ref. Abbott & Dance, 1982 p 367 c
Syn. Chama thaca G. I. Molina, 1782;
Venus (Venus) chilensis G. B. Sowerby, 1835 [not A. Orbigny, 1842];
Venus (Venus) dombei J. B. P. A. de Lamarck, 1818;
Venus (Venus) ignobilis R. A. Philippi, 1844;
Venus (Venus) rodriguezi R. A. Philippi, 1887
Ref. Bernard, 1983 p 52

tricolor G. B. Sowerby, 1835
(3-4-4-0-26-7-1-57-11-10-0-0-0)
[=Protothaca (Tropithaca) grata (T. Say, 1830)]
Ref. Abbott, 1974 p 526

tumida (G. B. Sowerby, 1853)
(3-4-4-0-26-7-1-57-11-11-0-0-0)
Ref. Keen, 1971 p 193