Subgenus (Pachydesma) T. A. Conrad, 1854

(3-4-4-0-26-7-9-28-3-0-0-0-0)
Ref. Bernard, 1983 p 53
Syn. (Trigonella) T. A. Conrad, 1837 [not E. M. da Costa, 1778]
Ref. Abbott, 1974 p 529
Vaught, 1989 p 136
[see also as Genus]

stultorum (J. Mawe, 1823) [T]
(3-4-4-0-26-7-9-28-3-1-0-0-0)
Pismo Clam
Ref. Abbott & Dance, 1982 p 356 c
Amer. Fish. Soc., 1988 p 45
Syn. Tivela crassatelloides R. E. C. Stearns, 1899
Ref. Abbott, 1974 p 529 c d
Syn. Cytherea (Tivela) alternata R. E. C. Stearns, 1899;
Cytherea (Tivela) aurora R. E. C. Stearns, 1899;
Cytherea (Tivela) biradiata R. E. C. Stearns, 1899;
Cytherea (Tivela) biserialis R. E. C. Stearns, 1899;
Cytherea (Tivela) crassatelliodes pauciradiata R. E. C. Stearns, 1899;
Cytherea (Tivela) duplicata R. E. C. Stearns, 1899;
Cytherea (Tivela) eccentrica R. E. C. Stearns, 1899;
Cytherea (Tivela) interrupta R. E. C. Stearns, 1899;
Cytherea (Tivela) luteobrunnea R. E. C. Stearns, 1899;
Cytherea (Tivela) multiradiata R. E. C. Stearns, 1899;
Cytherea (Tivela) ochracea R. E. C. Stearns, 1899;
Cytherea (Tivela) purpureochocolata R. E. C. Stearns, 1899;
Cytherea (Tivela) serialis R. E. C. Stearns, 1899;
Cytherea (Tivela) triradiata R. E. C. Stearns, 1899;
Cytherea (Tivela) triserialis R. E. C. Stearns, 1899;
Cytherea (Tivela) uniradiata R. E. C. Stearns, 1899;
Cytherea (Trigonella) crassatelliodes T. A. Conrad, 1837;
Cytherea (Trigonella) solidissima R. A. Philippi, 1851;
Donax stultorum Mawe, 1823 [not Cytherea stultorum K. T. Menke, 1847, nor Trigona stultorum J. E. Gray, 1838];
Trigona mactriodes authors [not I. Born, 1778]
Ref. Bernard, 1983 p 53