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.[2]

Semicassis
Temporal range: Eocene - Recent
A live individual of Semicassis undulata from Italy
Five views of a shell of Semicassis bisulcata from the Philippines
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Tonnoidea
Family: Cassidae
Genus: Semicassis
Mörch, 1852 [1]
Type species
Cassis japonica
Reeve, 1848
Synonyms[2]
  • 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

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 inornata (Pilsbry, 1895)
  • † Semicassis kaawaensis (Bartrum & Powell, 1928)
  • Semicassis labiata (Perry, 1811)
  • †Semicassis lilliei (C. A. Fleming, 1943)
  • † Semicassis marwicki (C. A. Fleming, 1943)
  • Semicassis microstoma (Martens, 1903)
  • 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 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 pauciruge: synonym of Semicassis paucirugis (Menke, 1843)
  • Semicassis salmonea Beu, Bouchet & Tröndlé, 2012: synonym of Semicassis bulla Habe, 1961


Fossil shell of Semicassis rondoletii

Extinct Species

Extinct species within this genus include:[3]

  • 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
  1. 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.
  2. WoRMS : Semicassis; accessed: 30 July 2020
  3. Fossilworks
  • Powell A. W. B. (1979). William Collins Publishers Ltd, Auckland ISBN 0-00-216906-1.


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