Subgenus (Rexithaerus) T. A. Conrad in G. W. Tryon, 1869

(3-4-4-0-24-14-1-24-10-0-0-0-0)
Ref. Abbott, 1974 p 507
Bernard, 1983 p 45
Keen, 1971 p 229
Lindner, 1977 p 112
Vaught, 1989 p 132
[see also as Genus]

dexioptera R. Baxter, 1977
(3-4-4-0-24-14-1-24-10-1-0-0-0)
Rightwing Macoma
Ref. Amer. Fish. Soc., 1988 p 41
Syn. Macoma (Macoma) dexioptera R. Baxter, 1977
Ref. Bernard, 1983 p 45

expansa P. P. Carpenter, 1864
(3-4-4-0-24-14-1-24-10-2-0-0-0)
Expanded Macoma
Ref. Amer. Fish. Soc., 1988 p 41
Syn. Macoma (Macoma) expansa P. P. Carpenter, 1864;
Macoma (Macoma) liotricha W. H. Dall, 1897
Ref. Bernard, 1983 p 45

indentata P. P. Carpenter, 1864
(3-4-4-0-24-14-1-24-10-3-0-0-0)
Indentated Macoma
Ref. Abbott, 1974 p 508
Amer. Fish. Soc., 1988 p 41
Keen, 1971 p 229 bw
Syn. Macoma (Macoma) indentata P. P. Carpenter, 1864;
Macoma (Rexithaerus) indentata tenuirostris W. H. Dall, 1900;
Macoma (Rexithaerus) rickettsi ex H. A. Rehder, ms, J. E. Steinbeck & E. F. Ricketts, 1941
Ref. Bernard, 1983 p 45

tenuirostris W. H. Dall, 1900
(3-4-4-0-24-14-1-24-10-3-1-0-0)
[=Macoma (Rexithaerus) indentata P. P. Carpenter, 1864]
Ref. Bernard, 1983 p 45

rickettsi ex H. A. Rehder, ms, J. E. Steinbeck & E. F. Ricketts, 1941
(3-4-4-0-24-14-1-24-10-4-0-0-0)
[=Macoma (Rexithaerus) indentata P. P. Carpenter, 1864]
Ref. Bernard, 1983 p 45

secta (T. A. Conrad, 1837) [T]
(3-4-4-0-24-14-1-24-10-5-0-0-0)
White Sand Macoma, White-sand Macoma
Ref. Abbott & Dance, 1982 p 344 c
Amer. Fish. Soc., 1988 p 41
Syn. Tellina (Tellina) ligamentina G. P. Deshayes, 1843
Ref. Abbott, 1974 p 507,508
Syn. Macoma (Macoma) secta edulis ex T. Nuttall, ms, P. P. Carpenter, 1864;
Tellina (Tellina) ligamentina G. P. Deshayes, 1843;
Tellina (Tellina) secta T. A. Conrad, 1837
Ref. Bernard, 1983 p 45

tenuirostris W. H. Dall, 1900
(3-4-4-0-24-14-1-24-10-6-0-0-0)
Ref. Abbott, 1974 p 508