Genus Parapholas T. A. Conrad, 1848

(3-4-3-2-1-1-2-25-0-0-0-0-0)
Ref. Abbott, 1974 p 547
Amer. Fish. Soc., 1988 p 46
Bernard, 1983 p 60
Keen, 1971 p 278
Syn. Paraphola F. Paetel, 1875
Ref. Vaught, 1989 p 138
Vokes, 1980 p 189

acuminata (G. B. Sowerby, 1834)
(3-4-3-2-1-1-2-25-0-1-0-0-0)
Ref. Keen, 1971 p 278 d
Syn. Pholas (Pholas) acuminata G. B. Sowerby, 1834 [not T. A. Conrad, 1845]
Ref. Bernard, 1983 p 60

bisulcata T. A. Conrad, 1849
(3-4-3-2-1-1-2-25-0-2-0-0-0)
[=Parapholas calva (G. B. Sowerby, 1834)]
Ref. Bernard, 1983 p 60
Keen, 1971 p 278

californica (T. A. Conrad, 1837) [T]
(3-4-3-2-1-1-2-25-0-3-0-0-0)
Scaleside Piddock, Scale-sided Piddock
Ref. Abbott, 1974 p 547 bw
Amer. Fish. Soc., 1988 p 46
Syn. Pholas (Pholas) californica T. A. Conrad, 1837;
Pholas (Pholas) janellii G. P. Deshayes, 1839
Ref. Bernard, 1983 p 60

calva (G. B. Sowerby, 1834)
(3-4-3-2-1-1-2-25-0-4-0-0-0)
Ref. Abbott, 1974 p 547
Syn. Parapholas bisulcata T. A. Conrad, 1849;
Pholas (Pholas) calva ex J. E. Gray, ms, G. B. Sowerby, 1834;
Pholas (Pholas) nana G. B. Sowerby, 1834
Ref. Bernard, 1983 p 60
Syn. Parapholas bisulcata T. A. Conrad, 1849;
Pholas (Pholas) nana G. B. Sowerby, 1834
Ref. Keen, 1971 p 278 d