Subgenus (Cetoconcha) W. H. Dall, 1886

(3-2-4-0-2-2-0-13-1-0-0-0-0)
Ref. Bernard, 1983 p 65
Keen, 1971 p 298
Syn. (Silenia) Smith, 1885 [not Mulsant, 1873]
Ref. Vaught, 1989 p 141
[see also as Genus]

malespinae (W. H. Dall, 1916)
(3-2-4-0-2-2-0-13-1-1-0-0-0)
Syn. Cetoconcha malespinae W. G. Ridewood, 1903
Ref. Bernard, 1983 p 65

perla W. H. Dall, 1908
(3-2-4-0-2-2-0-13-1-2-0-0-0)
Ref. Keen, 1971 p 298 d

scapha (W. H. Dall, 1902)
(3-2-4-0-2-2-0-13-1-3-0-0-0)
Size 0.5" long
Ref. Keen, 1971 p 298 d
Syn. Cetoconcha scapha W. H. Dall, 1902
Ref. Bernard, 1983 p 65

smithi [smithii] (W. H. Dall, 1908)
(3-2-4-0-2-2-0-13-1-4-0-0-0)
Ref. Keen, 1971 p 298
Syn. Cetoconcha smithii W. H. Dall, 1908
Ref. Bernard, 1983 p 65