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Assiminea grayana-Nl2.jpg
Apertural view of a shell of Assiminea grayana
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda

clade Hypsogastropoda
clade Littorinimorpha

Superfamily: Rissooidea
Family: Assimineidae
Genus: Assiminea
Fleming, 1828
Type species
Assiminea grayiana Leach = Nerita syncera hepatica Gray 1821

See text

  • Assemania Knight, 1900 (unjustified emendation)
  • Optediceros Leith, 1853
  • Syncera Gray 1821 (nomen nudum)

Assiminea is a genus of minute, salt-tolerant snails with an operculum, aquatic gastropod mollusks, or micromollusks, in the family Assimineidae. [1]

Distribution and habitat[edit]

These snails can be found worldwide. They live usually in brackish water and salt marshes of tropical and temperate regions, at beaches, in water and at land.


These are very small to medium large snails, between 2 and 13 mm). Some adults do not exceed a size of 3 mm. The shape of the thin shells is somewhat ovately conical. The margin of the aperture is simple. The operculum is in most cases horny. [2] [3] The eyes are at the end of short, stout stalks. They feed on vegetable detritus and small algae. They lay their eggs in the mud, and hatch as free-swimming larvae.


According to the World Register of Marine Species, the following species with valid names are included within the genus Assiminea : [4]

The Indo-Pacific Molluscan Database also includes the following species with names in current use : [6]

The database ITIS also mentions the following species : [7]

Species brought into synonymy


  • Fleming, J. 1828. A history of British animals, exhibiting the descriptive characters and systematic arrangement of the genera and species of quadrupeds, birds, reptiles, fishes, Mollusca, and Radiata of the United Kingdom; including the indigenous, extirpated, and extinct kinds, together with periodical and occasional visitants. - pp. i-xxxii [= 1-23], 1-565, [1]. Edinburgh. (Bell & Bradfute).
  • Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). ISBN 0-915826-22-4. XII, 195 pp.
  • 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
  • Gofas, S.; Afonso, J.P.; Brandào, M. (Ed.). (S.a.). Conchas e Moluscos de Angola = Coquillages et Mollusques d'Angola. [Shells and molluscs of Angola]. Universidade Agostinho / Elf Aquitaine Angola: Angola. 140 pp.
  • van Aartsen (2008). Basteria 72 (4-6) : 165-181