Subgenus (Phlyctiderma) W. H. Dall, 1899

(3-4-4-0-20-7-0-12-3-0-0-0-0)
Ref. Abbott, 1974 p 465
[see also as Genus]

discrepans (P. P. Carpenter, 1857)
(3-4-4-0-20-7-0-12-3-1-0-0-0)
Syn. Diplodonta (Diplodonta) semirugosa W. H. Dall, 1899
Ref. Abbott, 1974 p 465

semiaspera authors [not R. A. Philippi, 1836]
(3-4-4-0-20-7-0-12-3-2-0-0-0)
[=Phlyctiderma (Phlyctiderma) discrepans (P. P. Carpenter, 1857)]
Ref. Bernard, 1983 p 30

discrepans P. P. Carpenter, 1857
(3-4-4-0-20-7-0-12-3-2-1-0-0)
[=Phlyctiderma (Phlyctiderma) discrepans (P. P. Carpenter, 1857)]
Ref. Bernard, 1983 p 30

semiaspera (R. A. Philippi, 1836) [T]
(3-4-4-0-20-7-0-12-3-3-0-0-0)
Pimpled Diplodon
Ref. Amer. Fish. Soc., 1988 p 36
Syn. Diplodonta (Diplodonta) caelata (L. A. Reeve, 1850);
Diplodonta (Diplodonta) granulosa C. B. Adams
Ref. Abbott, 1974 p 465 bw

semirugosa W. H. Dall, 1899
(3-4-4-0-20-7-0-12-3-4-0-0-0)
[=Phlyctiderma (Phlyctiderma) discrepans (P. P. Carpenter, 1857)]
Ref. Bernard, 1983 p 30

soror C. B. Adams, 1852
(3-4-4-0-20-7-0-12-3-5-0-0-0)
Sister Diplodon
Ref. Abbott, 1974 p 465
Amer. Fish. Soc., 1988 p 36