Semicassis

{{Short description|Genus of gastropods}} {{Automatic taxobox |fossil_range = {{fossil range|37.2|0|Eocene - Recent}} |image = Semicassis granulata.jpg |image_caption = A live individual of ''Semicassis undulata'' from Italy |image2 = Semicassis bisulcata booleyi 01.JPG |image2_caption = Five views of a shell of ''Semicassis bisulcata'' from the Philippines |display_parents = 3 |taxon = Semicassis |authority = Mörch, 1852 <ref>Mörch, O.A.L. (1852) Catalogus Conchyliorum quae Reliquit D’Alphonso d’Aguirra & Gadea Comes de Yoldi, Regis Daniae Cubiculariorum Princeps, Ordinis Dannebrogici in Prima Classe & Ordinis Caroli Terth Eques. Vol. 1. L. Klein, Hafniae, 74 pp.</ref> | synonyms_ref = <ref name="WoRMS" /> | synonyms = * ''Antephalium'' Iredale, 1927 * ''Cassidea (Semicassis)'' Mörch, 1852 * ''Cassis (Semicassis)'' Mörch, 1852 (original rank) * ''Faurotis'' Jousseaume, 1888 * ''Maucassis'' C. A. Fleming, 1943 † * ''Phalium (Kahua)'' Marwick, 1928 † * ''Phalium (Semicassis)'' Mörch, 1852 * ''Phalium (Xenogalea)'' Iredale, 1927 * ''Semicassis (Antephalium)'' Iredale, 1927· accepted, alternate representation * ''Semicassis (Kahua)'' Marwick, 1928 †· accepted, alternate representation * ''Semicassis (Semicassis)'' Mörch, 1852· accepted, alternate representation * ''Semicassis (Xenophalium)'' Iredale, 1927 * ''Tylocassis'' Woodring, 1928 * ''Xenogalea'' Iredale, 1927 * ''Xenophalium'' Iredale, 1927 * ''Xenophalium (Mauicassis)'' C. A. Fleming, 1943 * ''Xenophalium (Xenogalea)'' Iredale, 1927 | type_species = ''Cassis japonica'' | type_species_authority = Reeve, 1848 }}

'''''Semicassis''''' is a genus of medium-sized predatory sea snails, marine gastropod molluscs in the subfamily Cassinae within the family Cassidae, the helmet snails and bonnet snails.<ref name="WoRMS">[http://www.marinespecies.org/aphia.php?p=taxdetails&id=415969 WoRMS : Semicassis; accessed: 30 July 2020]</ref>

==Species== According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus ''Semicassis'': *''Semicassis adcocki'' (Sowerby III, 1896) *''Semicassis angasi'' (Iredale, 1927) *''Semicassis bisulcata'' (Schubert & Wagner, 1829) *''Semicassis bondarevi'' Mühlhäusser & Parth, 1993 *''Semicassis bulla'' Habe, 1961 *''Semicassis canaliculata'' (Bruguière, 1792) * ''Semicassis cancellata'' (Lamarck, 1803) *''Semicassis centiquadrata'' (Valenciennes, 1832) *''Semicassis craticulata'' (Euthyme, 1885) * ''Semicassis decipiens'' (Kilburn, 1980) * ''Semicassis dorae'' (Kreipl & Mühlhäusser, 1996) * ''Semicassis dougthorni'' Dekkers, 2013 *''Semicassis faurotis'' (Jousseaume, 1888) * ''Semicassis fernandesi'' (Kilburn, 1975) * † ''Semicassis fibrata'' (P. Marshall & Murdoch, 1920) *''Semicassis glabrata'' (Dunker, 1852) *''Semicassis granulata'' (Born, 1778) - synonym: ''Phalium granulatum'' (Born, 1778) * † ''Semicassis grateloupi'' (Deshayes, 1853) *''Semicassis inornata'' (Pilsbry, 1895) * † ''Semicassis kaawaensis'' (Bartrum & Powell, 1928) *''Semicassis labiata'' (Perry, 1811) * † ''Semicassis laevigata'' (Defrance, 1817) * †''Semicassis lilliei'' (C. A. Fleming, 1943) * † ''Semicassis marwicki'' (C. A. Fleming, 1943) *''Semicassis microstoma'' (Martens, 1903) * † ''Semicassis neumayri'' (Hoernes, 1875) *''Semicassis paucirugis'' (Menke, 1843) *''Semicassis pyrum'' (Lamarck, 1822) *''Semicassis royana'' (Iredale, 1914) *''Semicassis saburon'' (Bruguière, 1792) *''Semicassis semigranosa'' (Lamarck, 1822) *''Semicassis sinuosa'' (Verco, 1904) * † ''Semicassis skinneri'' (Marwick, 1928) *''Semicassis sophia'' (Brazier, 1872) * † ''Semicassis subsulcosa'' (Hoernes & Auinger, 1884) * † ''Semicassis szilviae'' Kovács & Vicián, 2018 *''Semicassis thachi'' Kreipl, Alf & Eggeling, 2006 *''Semicassis thomsoni'' (Brazier, 1875) *''Semicassis umbilicata'' (Pease, 1861) * ''Semicassis undulata'' (Gmelin, 1791) *''Semicassis westralis'' Kreipl, 1997 *''Semicassis whitworthi'' (Abbott, 1968) * ''Semicassis zeylanica'' (Lamarck, 1822) ;Species brought into synonymy: * ''Semicassis cicatricosa'' (Gmelin, 1791): synonym of ''Semicassis granulata'' (Born, 1778) * ''Semicassis diuturna'' Iredale, 1927: synonym of ''Semicassis bisulcata'' (Schubert & J. A. Wagner, 1829) * ''Semicassis japonica'' (Reeve, 1848): synonym of ''Semicassis bisulcata'' (Schubert & J. A. Wagner, 1829) * ''Semicassis miolaevigata'' Sacco, 1890: synonym of ''Semicassis saburon'' (Bruguière, 1792) * ''Semicassis obscura'' Habe, 1961: synonym of ''Semicassis bulla'' Habe, 1961 * ''Semicassis pauciruge'': synonym of ''Semicassis paucirugis'' (Menke, 1843) * ''Semicassis persimilis'' Kira, 1955: synonym of ''Semicassis bisulcata'' (Schubert & J. A. Wagner, 1829) * ''Semicassis pila'' (Reeve, 1848): synonym of ''Semicassis bisulcata'' (Schubert & J. A. Wagner, 1829) * ''Semicassis salmonea'' Beu, Bouchet & Tröndlé, 2012: synonym of ''Semicassis bulla'' Habe, 1961 thumb|250px|right|Fossil shell of ''Semicassis rondoletii''

==Extinct Species== Extinct species within this genus include:<ref>[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=10447 Fossilworks]</ref> *''Semicassis aldrichi'' Dall 1890 † *''Semicassis angasi'' Iredale 1927 † *''Semicassis deneseplicata'' Martin 1916 † *''Semicassis harpaeformis'' Lamarck 1803 † *''Semicassis labiata'' Perry 1811 † *''Semicassis monilifera'' Sowerby 1846 † *''Semicassis oligocalantica'' Vredenburg 1925 † *''Semicassis ovulum'' Ortmann 1900 † *''Semicassis pyshtensis'' Addicott 1976 † *''Semicassis reclusa'' Guppy 1873 †

Fossils of species within this genus have been found all over the world in sediments from Eocene to Quaternary (age range: 37.2 to 0.0 million years ago).

==References== {{Commons category}} {{Reflist}} * Powell A. W. B. (1979). William Collins Publishers Ltd, Auckland {{ISBN|0-00-216906-1}}.

Category:Cassidae Category:Gastropod genera Category:Extant Eocene first appearances Category:Taxa named by Otto Andreas Lowson Mörch