Genus Cosa Finlay, 1926

(3-7-3-0-4-5-0-6-0-0-0-0-0)
Ref. Abbott, 1974 p 428
Amer. Fish. Soc., 1988 p 25
Vokes, 1980 p 22
Syn. Denticosa T. Iredale, 1930 ?
Ref. Vaught, 1989 p 116

brasiliensis Klappenbach, 1966
(3-7-3-0-4-5-0-6-0-1-0-0-0)
Ref. Abbott, 1974 p 428

caribaea R. T. Abbott, 1958
(3-7-3-0-4-5-0-6-0-2-0-0-0)
Caribbean Philobrya
Ref. Abbott, 1974 p 428 d
Amer. Fish. Soc., 1988 p 25

costata F. Bernard, 1878 [T]
(3-7-3-0-4-5-0-6-0-3-0-0-0)
Ref. Abbott, 1974 p 428