{{short description|Genus of mollusc}} {{taxobox | image = Helicostoa sinensis shell.jpg | image_caption = Syntypes of ''Helicostoa sinensis''. | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda<br/>clade Hypsogastropoda<br/>clade Littorinimorpha | superfamilia = Truncatelloidea | familia = '''Helicostoidae''' | familia_authority = Pruvot-Fol, 1937<ref>{{in lang|fr}} Pruvot-Fol A. (1937). "Etude d'un prosobranche d'eau douce: ''Helicostoa sinensis'' Lamy". ''Bulletin de la Société Zoologique de France'' '''62''': [http://gallica.bnf.fr/ark:/12148/bpt6k54444228.image.langEN.f295.pagination 250]-[http://gallica.bnf.fr/ark:/12148/bpt6k54444228.image.f306.langEN.pagination 257].</ref> | genus = '''''Helicostoa''''' | genus_authority = Lamy, 1926<ref name="Lamy 1926">{{in lang|fr}} Lamy E. (1926). "Sur une coquille enigmatique". ''Journal de Conchyliologie'' '''70''': [http://gallica.bnf.fr/ark:/12148/bpt6k5568605g.image.langEN.f58.pagination 51]-56. [http://gallica.bnf.fr/ark:/12148/bpt6k5568605g.image.f59.pagination.langEN drawing].</ref> | species = '''''H. sinensis''''' | binomial = ''Helicostoa sinensis'' | binomial_authority = Lamy, 1926<ref name="Lamy 1926" /> }}
'''''Helicostoa''''' is a monotypic genus of freshwater snail, an aquatic gastropod mollusc in the order Littorinimorpha containing the single species '''''Helicostoa sinensis'''''.<ref name="Bouchet">{{Bouchet 2005}}</ref>
'''''Helicostoa''''' is also the only genus in the family '''Helicostoidae'''.<ref name="Strong 2008">Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". ''Hydrobiologia'' 595: 149-166. {{hdl|10088/7390}} {{doi|10.1007/s10750-007-9012-6}}.</ref> According to taxonomy of the Gastropoda by Bouchet & Rocroi (2005) the family Helicostoidae has no subfamilies.
''Helicostoa sinensis'' was previously tentatively placed within the superfamily Rissooidea.<ref name="Bouchet" /> and before that it was in the superfamily Vermetoidea.<ref name="Bouchet" />
''Helicostoa sinensis'' is only found in China,<ref name="Strong 2008" /> more specifically in the Yangtze River.<ref name="Bouchet" />
This freshwater snail lives attached or bonded to blocks of limestone.<ref name="Strong 2008" />
== References == {{Reflist}}
{{Taxonbar|from1=Q20679000|from2=Q5705239|from3=Q21293821}}
Category:Truncatelloidea Category:Gastropods described in 1926 Category:Monotypic gastropod genera