''Alcyna'' is a genus of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusks in the family Trochidae, the top snails. This genus was previously included in the family

Phasianellidae Phasianellidae common name the "pheasant shells" or "pheasant snails" is a family of small sea snails with calcareous opercula, marine gastropod mollusks in the subclass Vetigastropoda Vetigastropoda is a major Taxonomy (biology), taxonomi ...

Description

The minute shell is similar in form to ''

Phasianella ''Phasianella'', common name the pheasant shells, is a genus of small sea snails with a calcareous operculum and a colorfully patterned shell, a marine gastropod mollusc in the family Phasianellidae. Description The white shell has a bulimifor ...

''. The aperture is ovate. The columella has a heavy callus, bearing near the base a strong curved denticle projecting into the aperture. The outer lip is simple. The imperforate shell is acutely ovate. The convex

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane flo ...

s are spirally lirate and longitudinally striate. The columella is callous, and toothed below. The outer lip is smooth or toothed within, and varicose exteriorly.Tryon (1887), Manual of Conchology IX – Solariidae (by William B. Marshall), Ianthinidae, Trichotropidae, Scalariidae, Cerithiidae, Rissoidae, Littorinidae
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Species

Species within the genus ''Alcyna'' include: * '' Alcyna acia'' Cotton, 1948 * '' Alcyna australis'' Hedley, 1907 * '' Alcyna exigua'' (Gould, A.A., 1861) * '' Alcyna kingensis'' (Gabriel, 1956) * '' Alcyna lifuensis'' Melvill & Standen, 1896 * '' Alcyna lucida'' (H. Adams, 1868) * '' Alcyna ocellata'' A. Adams, 1860 * '' Alcyna subangulata'' Pease, 1861 ;The following species were brought into synonymy: * ''Alcyna flammulata'' Pilsbry, 1917: synonym of '' Alcyna subangulata'' Pease, 1861 * ''Alcyna kapiolaniae'' Pilsbry, 1917: synonym of ''Alcyna ocellata'' A. Adams, 1860 * ''Alcyna kuhnsi'' Pilsbry, 1917: synonym of ''Alcyna ocellata'' A. Adams, 1860 * ''Alcyna lepida'' A. Adams, 1860: synonym of '' Alcyna ocellata'' A. Adams, 1860 * ''Alcyna lineata'' Pease, 1869: synonym of ''Alcyna subangulata'' Pease, 1861 * ''Alcyna rubra'' Pease, 1861: synonym of '' Alcyna ocellata'' A. Adams, 1860 * ''Alcyna striata'' Pease, 1869: synonym of '' Alcyna subangulata'' Pease, 1861 * ''Alcyna subangulata flammulata'' Pilsbry, 1917: synonym of '' Alcyna subangulata'' Pease, 1861 * ''Alcyna subangulata virgata'' Pilsbry, 1917: synonym of '' Alcyna subangulata'' Pease, 1861 * ''Alcyna virgata'' Pilsbry, 1917: synonym of '' Alcyna subangulata'' Pease, 1861

References

* A. Adams (1860), ''On some new genera and species of Mollusca from Japan''; The Annals and Magazine of Natural History, 1860

External links

GenBank

World Register of Marine Species

T. Sasaki, ''Micromolluscs in Japan: taxonomic composition, habitats, and future topics''; Zoosymposia, 2008

V Héros, P Lozouet, P Maestrati ''et al.''; ''Mollusca of New Caledonia'' (2007); Institut de Recherche pour le Développement
{{Taxonbar, from=Q4713393 Trochidae Gastropod genera