Zemysia is a genus of bivalves in the family Ungulinidae. It may also be treated as a subgenus of Felaniella, particularly in the earlier literature.
Species There are five recognized extant species: Zemysia ohtai (Kase & Miyauchi, 1996) Zemysia rakiura A. W. B. Powell, 1939 Zemysia subcrassa (E. A. Smith, 1884) Zemysia tasmanica (Tenison Woods, 1877) Zemysia zelandica (J. E. Gray, 1835)
There are also a number of species only known from the fossil record: †Zemysia ampla (F. W. Hutton, 1885) †Zemysia bidens (Deshayes, 1857) †Zemysia duplicata (Deshayes, 1857) †Zemysia elliptica (Lamarck, 1805) †Zemysia infrequens (Marwick, 1926)
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