Subgenus (Crenella) T. Brown, 1827

(3-7-5-0-1-2-1-8-2-0-0-0-0)
Ref. Wagner, 1984 p 51

caudiva A. A. Olsson, 1961
(3-7-5-0-1-2-1-8-2-1-0-0-0)
Ref. Bernard, 1983 p 20
Keen, 1971 p 65 bw

coarctata ex W. Dunker, ms, P. P. Carpenter, 1857
(3-7-5-0-1-2-1-8-2-2-0-0-0)
[=Gregariella coralliophaga (J. F. Gmelin, 1791)]
Ref. Bernard, 1983 p 20

columbiana W. H. Dall, 1897
(3-7-5-0-1-2-1-8-2-3-0-0-0)
[=Megacrenella columbiana (W. H. Dall, 1897)]
Ref. Bernard, 1983 p 20

decussata [decussatus] (G. Montagu, 1808) [T]
(3-7-5-0-1-2-1-8-2-4-0-0-0)
Cross-sculpture Crenella, Decussate Crenella
Ref. Abbott, 1974 p 430 d
Amer. Fish. Soc., 1988 p 23
Syn. Crenella (Crenella) decussata laticostata O. A. Scarlato, 1960;
Crenella (Crenella) yokoyamai S. Nomura, 1932;
Mytilus (Mytilus) decussatus G. Montagu, 1808
Ref. Bernard, 1983 p 20
Syn. Mytilus (Mytilus) decussatus G. Montagu, 1808
Ref. Bernard, 1984 p 24 d
Wagner, 1984 p 51 bw

laticostata O. A. Scarlato, 1960
(3-7-5-0-1-2-1-8-2-4-1-0-0)
[=Crenella (Crenella) decussata (G. Montagu, 1808)]
Ref. Bernard, 1983 p 20

divaricata (A. Orbigny, 1847) [(1845)] [(1842)]
(3-7-5-0-1-2-1-8-2-5-0-0-0)
Spreading-sculpture Crenella
Ref. Abbott, 1974 p 431
Amer. Fish. Soc., 1988 p 23
Syn. Crenella (Crenella) ecuadoriana H. A. Pilsbry & A. A. Olsson, 1941;
Crenella (Crenella) inflata P. P. Carpenter, 1864, not Mytilus inflatus O. F. Muller, 1847;
Nuculocardia divaricata A. Orbigny in R. Sagra, 1847
Ref. Bernard, 1983 p 20
Syn. Crenella (Crenella) ecuadoriana H. A. Pilsbry & A. A. Olsson, 1941;
Crenella (Crenella) inflata P. P. Carpenter, 1864
Ref. Keen, 1971 p 65 bw

ecuadoriana H. A. Pilsbry & A. A. Olsson, 1941
(3-7-5-0-1-2-1-8-2-6-0-0-0)
[=Crenella (Crenella) divaricata (A. Orbigny, 1847)]
Ref. Bernard, 1983 p 20
Keen, 1971 p 65

fragilis A. E. Verrill, 1885
(3-7-5-0-1-2-1-8-2-7-0-0-0)
Fragile Crenella
Ref. Abbott, 1974 p 431 d
Amer. Fish. Soc., 1988 p 23

glandula J. G. Totten, 1834
(3-7-5-0-1-2-1-8-2-8-0-0-0)
Glandular Crenella
Ref. Abbott, 1974 p 430 bw
Amer. Fish. Soc., 1988 p 23
Wagner, 1984 p 52 bw

grisea W. H. Dall, 1907
(3-7-5-0-1-2-1-8-2-9-0-0-0)
[=Crenella (Crenella) seminuda (W. H. Dall, 1897)]
Ref. Bernard, 1983 p 20

inflata P. P. Carpenter, 1864, not Mytilus inflatus O. F. Muller, 1847
(3-7-5-0-1-2-1-8-2-10-0-0-0)
[=Crenella (Crenella) divaricata (A. Orbigny, 1847)]
Ref. Bernard, 1983 p 20
Keen, 1971 p 65

leana W. H. Dall, 1897
(3-7-5-0-1-2-1-8-2-11-0-0-0)
Lea Crenella
Ref. Abbott, 1974 p 431
Amer. Fish. Soc., 1988 p 23
Bernard, 1983 p 20

megas W. H. Dall, 1902
(3-7-5-0-1-2-1-8-2-12-0-0-0)
[?=Megacrenella columbiana (W. H. Dall, 1897)]
Ref. Keen, 1971 p 67

pectinula (A. A. Gould, 1841)
(3-7-5-0-1-2-1-8-2-13-0-0-0)
Little-comb Crenella
Ref. Abbott, 1974 p 67
Amer. Fish. Soc., 1988 p 23

rotundata W. H. Dall, 1916
(3-7-5-0-1-2-1-8-2-14-0-0-0)
[=Rhomboidella (Solamen) columbiana (W. H. Dall, 1897)]
Ref. Abbott, 1974 p 431
[=Megacrenella columbiana (W. H. Dall, 1897)]
Ref. Bernard, 1983 p 20
Keen, 1971 p 67

seminuda (W. H. Dall, 1897)
(3-7-5-0-1-2-1-8-2-15-0-0-0)
Partly-sculptured Crenella
Ref. Amer. Fish. Soc., 1988 p 23
Syn. Crenella (Crenella) grisea W. H. Dall, 1907;
Modioloria seminuda W. H. Dall, 1897
Ref. Bernard, 1983 p 20

skomma (J. S. Schwengel, 1944)
(3-7-5-0-1-2-1-8-2-16-0-0-0)
Joking Crenella
Ref. Abbott, 1974 p 431
Amer. Fish. Soc., 1988 p 23

tamurai T. Habe, 1955
(3-7-5-0-1-2-1-8-2-17-0-0-0)
[=Megacrenella columbiana (W. H. Dall, 1897)]
Ref. Bernard, 1983 p 20

yokoyamai S. Nomura, 1932
(3-7-5-0-1-2-1-8-2-18-0-0-0)
[=Crenella (Crenella) decussata (G. Montagu, 1808)]
Ref. Bernard, 1983 p 20