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Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
informal group Lower Heterobranchia
Superfamily: Omalogyroidea
Family: Omalogyridae
Genus: Omalogyra
Jeffreys, 1859
Type species
Skenea nitidissima Forbes & Hanley, 1853

See text

  • Ammonicerina O. G. Costa, 1861
  • Helisalia Laseron, 1954
  • Homalogyra Jeffreys, 1867

Omalogyra is a genus of minute marine gastropod molluscs in the family Omalogyridae. [1]

This genus includes the smallest gastropods, with adult sizes of 1 mm and even less.


Species within the genus Omalogyra include:

Species brought into synonymy
  • Omalogyra (Ammonicera) Vayssière, 1893: synonym of Ammonicera Vayssière, 1893
  • Omalogyra (Ammonicera) planorbis (Dall, 1927): synonym of Palazzia planorbis (Dall, 1927)
  • Omalogyra (Ammonicera) rota Forbes & Hanley, 1850: synonym of Ammonicera rota (Forbes & Hanley, 1850)
  • Omalogyra ausonia Palazzi, 1988: synonym of Palazzia ausonia (Palazzi, 1988)
  • Omalogyra bicarinata Suter, 1908: synonym of Zerotula bicarinata (Suter, 1908)
  • Omalogyra discula Palazzi, 1988: synonym of Omalogyra disculus Palazzi, 1988
  • Omalogyra fischeriana Monterosato, 1869: synonym of Ammonicera fischeriana (Monterosato, 1869)
  • Omalogyra nodicarinata Sleurs, 1983: synonym of Ammonicera nodicarinata (Sleurs, 1985)
  • Omalogyra planorbis (Dall, 1927): synonym of Palazzia planorbis (Dall, 1927)
  • Omalogyra pulcherrima Brazier in Henn & Brazier, 1894: synonym of Liotella pulcherrima (Brazier in Henn & Brazier, 1894)
  • Omalogyra vangoethemi Sleurs, 1983: synonym of Ammonicera vangoethemi (Sleurs, 1985)


  1. ^ a b Bouchet, P.; Gofas, S. (2011). Omalogyra Jeffreys, 1859. Accessed through: World Register of Marine Species at on 2012-01-10
  • "Omalogyra". Integrated Taxonomic Information System. 
  • Jeffreys, J.G. 1859. Notes on British Mollusca , in answer to Mr William Clark's remarks on "Gleanings in British Conchology". Annals and Magazine of Natural History 3: 496-499
  • Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213