{{Short description|Genus of gastropods}} {{Automatic taxobox | image = Alcyna lifuensis 001.jpg | image_caption = Drawing of a shell of ''Alcyna lifuensis'' | display_parents = 3 | taxon = Alcyna | authority = A. Adams, 1860{{No-gastropod-genus-ref}} | type_species = ''Alcyna ocellata'' | type_species_authority = Adams, A., 1860 | synonyms = * ''Euchelus (Nevillia)'' <small>H. Adams, 1868</small> * ''Nevillia'' <small>H. Adams, 1868</small> | synonyms_ref = <ref name="WoRMS"/> }}
'''''Alcyna''''' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.<ref name="WoRMS">{{WRMS species|512276|''Alcyna'' A. Adams, 1860||18 December 2018}}</ref>
This genus was previously included in the family Phasianellidae.
==Description== The minute shell is similar in form to ''Phasianella''. 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.<ref>[https://www.biodiversitylibrary.org/item/77914 G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia]</ref>
The imperforate shell is acutely ovate. The convex whorls are spirally lirate and longitudinally striate. The columella is callous, and toothed below. The outer lip is smooth or toothed within, and varicose exteriorly.<ref>[https://archive.org/details/manualconch09tryorich Tryon (1887), Manual of Conchology IX – Solariidae (by William B. Marshall), Ianthinidae, Trichotropidae, Scalariidae, Cerithiidae, Rissoidae, Littorinidae]</ref>
==Species== Species within the genus ''Alcyna'' include:<ref name="WoRMS" /> * ''Alcyna acia'' <small>Cotton, 1948</small> * ''Alcyna australis'' <small>Hedley, 1907</small> * ''Alcyna exigua'' <small>(Gould, A.A., 1861)</small> * ''Alcyna kingensis'' <small>(Gabriel, 1956)</small> * ''Alcyna lifuensis'' <small>Melvill & Standen, 1896</small> * ''Alcyna lucida'' <small>(H. Adams, 1868)</small> * ''Alcyna ocellata'' <small>A. Adams, 1860</small> * ''Alcyna subangulata'' <small>Pease, 1861</small>
;'''The following species were brought into synonymy:'''<ref name="WoRMS" /> * ''Alcyna flammulata'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small> * ''Alcyna kapiolaniae'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna ocellata'' <small>A. Adams, 1860</small> * ''Alcyna kuhnsi'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna ocellata'' <small>A. Adams, 1860</small> * ''Alcyna lepida'' <small>A. Adams, 1860</small>: synonym of ''Alcyna ocellata'' <small>A. Adams, 1860</small> * ''Alcyna lineata'' <small>Pease, 1869</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small> * ''Alcyna rubra'' <small>Pease, 1861</small>: synonym of ''Alcyna ocellata'' <small>A. Adams, 1860</small> * ''Alcyna striata'' <small>Pease, 1869</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small> * ''Alcyna subangulata flammulata'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small> * ''Alcyna subangulata virgata'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small> * ''Alcyna virgata'' <small>Pilsbry, 1917</small>: synonym of ''Alcyna subangulata'' <small>Pease, 1861</small>
==References== {{Reflist}} * A. Adams (1860), ''On some new genera and species of Mollusca from Japan''; The Annals and Magazine of Natural History, 1860
==External links== {{Commons category}} * [https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=648599&lvl=0 GenBank ] * [http://www.marinespecies.org/aphia.php?p=taxdetails&id=512276 World Register of Marine Species] * [https://web.archive.org/web/20130925091220/http://www.um.u-tokyo.ac.jp/hp/sasaki/p/042.pdf T. Sasaki, ''Micromolluscs in Japan: taxonomic composition, habitats, and future topics''; Zoosymposia, 2008] * [http://nouvelle-caledonie.ird.fr/layout/set/popup/content/download/32584/250886/version/1/file/HerosLozouMaest-v.pdf V Héros, P Lozouet, P Maestrati ''et al.''; ''Mollusca of New Caledonia'' (2007); Institut de Recherche pour le Développement]
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Category:Alcyna Category:Trochidae Category:Gastropod genera Category:Taxa named by Arthur Adams (zoologist)