Subgenus (Phlyctiderma) W. H. Dall, 1899

(3-4-4-0-20-7-0-31-2-0-0-0-0)
Ref. Bernard, 1983 p 30
Keen, 1971 p 129

discrepans (P. P. Carpenter, 1857)
(3-4-4-0-20-7-0-31-2-1-0-0-0)
Syn. Diplodonta (Phlyctiderma) semiaspera authors [not R. A. Philippi, 1836];
Diplodonta (Phlyctiderma) semiaspera discrepans P. P. Carpenter, 1857;
Diplodonta (Diplodonta) semirugosa W. H. Dall, 1899
Ref. Bernard, 1983 p 30
Syn. Diplodonta (Diplodonta) semirugosa W. H. Dall, 1899
Ref. Keen, 1971 p 129 bw

elenense A. A. Olsson, 1961
(3-4-4-0-20-7-0-31-2-2-0-0-0)
Ref. Bernard, 1983 p 30
Keen, 1971 p 129 bw

insula A. A. Olsson, 1961
(3-4-4-0-20-7-0-31-2-3-0-0-0)
Ref. Bernard, 1983 p 30
Keen, 1971 p 129 bw

semiasperum (R. A. Philippi, 1836)
(3-4-4-0-20-7-0-31-2-4-0-0-0)
Ref. Keen, 1971 p 129