Semicassis

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.

==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