Subgenus (Mactrotoma) W. H. Dall, 1894

(3-4-4-0-21-3-2-41-12-0-0-0-0)
Ref. Abbott, 1974 p 488
Lindner, 1977 p 111
Vaught, 1989 p 130
[see also as Genus]

dolabriformis (T. A. Conrad, 1867)
(3-4-4-0-21-3-2-41-12-1-0-0-0)
Hatchet Surfclam
Ref. Amer. Fish. Soc., 1988 p 40
Keen, 1971 p 202 d

fragilis J. F. Gmelin, 1791 [T] (
3-4-4-0-21-3-2-41-12-2-0-0-0)
Fragile Atlantic Mactra, Fragile Surfclam
Ref. Abbott, 1974 p 488 bw d
Abbott & Dance, 1982 p 335 c
Amer. Fish. Soc., 1988 p 40

nasuta A. A. Gould, 1851
(3-4-4-0-21-3-2-41-12-3-0-0-0)
Bent Surfclam
Ref. Amer. Fish. Soc., 1988 p 40
Syn. Mactra (Mactra) californica L. A. Reeve, 1854;
Mactra (Mactra) deshayesi T. A. Conrad, 1868 [not C. Mayer, 1867];
Mactra (Mactra) falcata authors [not A. A. Gould, 1850];
Mactra (Mactra) hiantina G. P. Deshayes, 1855;
Mactra (Mactra) nasuta A. A. Gould, 1851;
Mactrotoma revellei J. W. Durham, 1950
Ref. Bernard, 1983 p 39
Syn. Mactra (Mactra) californica L. A. Reeve, 1854 [not T. A. Conrad, 1837];
Mactra (Mactra) hiantina G. P. Deshayes, 1855;
Mactrotoma Revellei J. W. Durham, 1950
Ref. Keen, 1971 p 202 bw