Subgenus (Poromya) E. Forbes, 1844

(3-2-4-0-2-2-0-13-5-0-0-0-0)
Ref. Bernard, 1983 p 65

granatina W. H. Dall, 1881
(3-2-4-0-2-2-0-13-5-1-0-0-0)
[=Basterotia quadrata (R. B. Hinds, 1843)]
[found under SPORTELLIDAE]
Ref. Abbott, 1974 p 476

granulata (P. H. Nyst & Westendorp, 1839) [T]
(3-2-4-0-2-2-0-13-5-2-0-0-0)
Granular Poromya, Granulate Sea Mussel
Size 0.25"-0.5" long
Ref. Amer. Fish. Soc., 1988 p 49
Morris, 1973 p 103 bw
Syn. ? Poromya (Poromya) rotundata J. G. Jeffreys, 1876
Ref. Abbott, 1974 p 561

isocardioides P. Dautzenberg & P. Fischer, 1897
(3-2-4-0-2-2-0-13-5-3-0-0-0)
[=Poromya (Cetomya) tornata (J. G. Jeffreys, 1876)]
Ref. Abbott, 1974 p 562

microdonta W. H. Dall, 1890
(3-2-4-0-2-2-0-13-5-4-0-0-0)
[=Poromya (Cetomya) tornata (J. G. Jeffreys, 1876)]
Ref. Abbott, 1974 p 562

paradoxa G. P. Deshayes, 1857
(3-2-4-0-2-2-0-13-5-5-0-0-0)
[=Anisodonta (Fulcrella) paradoxa G. P. Deshayes, 1857]
[found under SPORTELLIDAE]
Ref. Abbott, 1974 p 476

perla W. H. Dall, 1908
(3-2-4-0-2-2-0-13-5-6-0-0-0)
Ref. Bernard, 1983 p 65

rotundata J. G. Jeffreys, 1876
(3-2-4-0-2-2-0-13-5-7-0-0-0)
[?=Poromya (Poromya) granulata (P. H. Nyst & Westendorp, 1839)]
Ref. Abbott, 1974 p 561

rostrata H. A. Rehder, 1943
(3-2-4-0-2-2-0-13-5-8-0-0-0)
Rostrate Poromya
Size 0.33"
Ref. Abbott, 1974 p 561 bw
Amer. Fish. Soc., 1988 p 49

sublevis A. E. Verrill, 1884
(3-2-4-0-2-2-0-13-5-9-0-0-0)
Smoothish Sea Mussel
Size 0.75" long
Ref. Morris, 1973 p 103 bw
[=Poromya (Cetomya) tornata (J. G. Jeffreys, 1876)]
Ref. Abbott, 1974 p 562