Subgenus (Diplodonta) H. G. Bronn, 1831

(3-4-4-0-20-7-0-12-1-0-0-0-0)
Ref. Abbott, 1974 p 464

aleutica W. H. Dall, 1901
(3-4-4-0-20-7-0-12-1-1-0-0-0)
Aleutian Diplodon
Ref. Abbott, 1974 p 465
Amer. Fish. Soc., 1988 p 36
Syn. Diplodonta (Diplodonta) torelli aleutica W. H. Dall, 1901
Ref. Bernard, 1983 p 30

artemidis W. H. Dall, 1909
(3-4-4-0-20-7-0-12-1-2-0-0-0)
[=Diplodonta (Felaniella) sericata (L. A. Reeve, 1850)]
Ref. Abbott, 1974 p 465
[=Felaniella (Zemysia) sericata (L. A. Reeve, 1850)]
Ref. Keen, 1971 p 128

caelata (L. A. Reeve, 1850)
(3-4-4-0-20-7-0-12-1-3-0-0-0)
[=Diplodonta (Phlyctiderma) semiaspera (R. A. Philippi, 1836)]
Ref. Abbott, 1974 p 465

granulosa C. B. Adams
(3-4-4-0-20-7-0-12-1-4-0-0-0)
[=Diplodonta (Phlyctiderma) semiaspera (R. A. Philippi, 1836)]
Ref. Abbott, 1974 p 465

impolita S. S. Berry, 1953
(3-4-4-0-20-7-0-12-1-5-0-0-0)
Rough Diplodon
Ref. Amer. Fish. Soc., 1988 p 36
Syn. Lucina orbella authors [not A. A. Gould, 1851]
Ref. Bernard, 1983 p 30

inconspicua R. A. Philippi, 1845
(3-4-4-0-20-7-0-12-1-6-0-0-0)
[=Felaniella (Zemysia) inconspicua (R. A. Philippi, 1845)]
Ref. Bernard, 1983 p 30

inezensis (L. G. Hertlein & A. M. Strong, 1947)
(3-4-4-0-20-7-0-12-1-7-0-0-0)
Ref. Abbott, 1974 p 465
Keen, 1971 p 128 bw
Syn. Taras (Taras) inezensis L. G. Hertlein & A. M. Strong, 1947
Ref. Bernard, 1983 p 30

lamellata E. A. Smith, 1881
(3-4-4-0-20-7-0-12-1-8-0-0-0)
[=Lucinoma antarctica (R. A. Philippi, 1855)]
Ref. Bernard, 1983 p 29

lupina G. A. Brocchi, 1814 [f][T]
(3-4-4-0-20-7-0-12-1-9-0-0-0)
[Tertiary from Italy]
Ref. Abbott, 1974 p 464

notata W. H. Dall & C. T. Simpson, 1901
(3-4-4-0-20-7-0-12-1-10-0-0-0)
Marked Diplodon
Ref. Abbott, 1974 p 465
Amer. Fish. Soc., 1988 p 36

nucleiformis Wagner, 1838
(3-4-4-0-20-7-0-12-1-11-0-0-0)
Nut Diplodon
Ref. Abbott, 1974 p 465
Amer. Fish. Soc., 1988 p 36

obliqua R. A. Philippi, 1846
(3-4-4-0-20-7-0-12-1-12-0-0-0)
[=Felaniella (Zemysia) obliqua (R. A. Philippi, 1846)]
Ref. Bernard, 1983 p 30
[?=Felaniella (Zemysia) calculus (L. A. Reeve, 1850)]
Ref. Keen, 1971 p 128

orbella [orbellus] (A. A. Gould, 1851)+[A. A. Gould, 1852]
(3-4-4-0-20-7-0-12-1-13-0-0-0)
Orb Diplodon, Pacific Orb Diplodon
Ref. Abbott, 1974 p 465 d
Amer. Fish. Soc., 1988 p 36
Keen, 1971 p 128
Syn. Diplodonta (Diplodonta) semiaspera authors [not R. A. Philippi, 1836];
Lucina orbella A. A. Gould, 1851;
Sphaerella tumida ex T. A. Conrad, ms, P. P. Carpenter, 1864
Ref. Bernard, 1983 p 30

impolita S. S. Berry, 1953
(3-4-4-0-20-7-0-12-1-13-1-0-0)
Ref. Abbott, 1974 p 465 d

subquadrata P. P. Carpenter, 1856
(3-4-4-0-20-7-0-12-1-13-2-0-0)
Ref. Abbott, 1974 p 465

pacifica P. Fischer, 1860
(3-4-4-0-20-7-0-12-1-13-0-0-0)
Syn. Diplodonta (Diplodonta) suprema A. A. Olsson, 1961
Ref. Bernard, 1983 p 30

philippii L. H. Hupe in Gay, 1845
(3-4-4-0-20-7-0-12-1-14-0-0-0)
[=Felaniella (Zemysia) inconspicua (R. A. Philippi, 1845)]
Ref. Bernard, 1983 p 30

punctata (T. Say, 1822)
(3-4-4-0-20-7-0-12-1-15-0-0-0)
Atlantic Diplodon, Common Atlantic Diplodon
Ref. Amer. Fish. Soc., 1988 p 36
Syn. Mysia pellucida A. Heilprin, 1889
Ref. Abbott, 1974 p 464 bw ?

rotundata (G. Montagu, 1803)
(3-4-4-0-20-7-0-12-1-16-0-0-0)
Rotund Diplodon
Ref. Abbott & Dance, 1982 p 322 c

semiaspera authors [not R. A. Philippi, 1836]
(3-4-4-0-20-7-0-12-1-17-0-0-0)
[=Diplodonta (Diplodonta) orbella (A. A. Gould, 1851)]
Ref. Bernard, 1983 p 30

semirugosa W. H. Dall, 1899
(3-4-4-0-20-7-0-12-1-18-0-0-0)
[=Diplodonta (Phlyctiderma) discrepans (P. P. Carpenter, 1857)]
Ref. Abbott, 1974 p 465
[=Phlyctiderma (Phlyctiderma) discrepans (P. P. Carpenter, 1857)]
Ref. Keen, 1971 p 129

serricata authors
(3-4-4-0-20-7-0-12-1-19-0-0-0)
[=Felaniella (Zemysia) sericata (L. A. Reeve, 1850)]
Ref. Keen, 1971 p 128

subquadrata (P. P. Carpenter, 1856)
(3-4-4-0-20-7-0-12-1-20-0-0-0)
Ref. Keen, 1971 p 128 bw
Syn. Diplodonta (Diplodonta) subquadrata baltrana L. G. Hertlein, 1972
Ref. Bernard, 1983 p 30

baltrana L. G. Hertlein, 1972
(3-4-4-0-20-7-0-12-1-20-10-0-0)
[=Diplodonta (Diplodonta) subquadrata P. P. Carpenter, 1856]
Ref. Bernard, 1983 p 30

suprema A. A. Olsson, 1961
(3-4-4-0-20-7-0-12-1-21-0-0-0)
Ref. Keen, 1971 p 128 bw
[=Diplodonta (Diplodonta) pacifica P. Fischer, 1860]
Ref. Bernard, 1983 p 30

tellinoides (L. A. Reeve, 1850)
(3-4-4-0-20-7-0-12-1-22-0-0-0)
[=Diplodonta (Felaniella) sericata (L. A. Reeve, 1850)]
Ref. Abbott, 1974 p 465

torelli
(3-4-4-0-20-7-0-12-1-23-0-0-0)

aleutica W. H. Dall, 1901
(3-4-4-0-20-7-0-12-1-23-1-0-0)
[=Diplodonta (Diplodonta) aleutica W. H. Dall, 1901]
Ref. Bernard, 1983 p 30

turgida A. E. Verrill & E. A. Smith, 1881 [not T. A. Conrad, 1848]
(3-4-4-0-20-7-0-12-1-24-0-0-0)
[=Diplodonta (Timothynus) verrilli W. H. Dall, 1900]
Ref. Abbott, 1974 p 465
Abbott & Dance, 1982 p 322