Classification of the genus Semicassis
G. Semicassis Mörch 1852
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†Cassidea (Semicassis) bituminata Martin 1933
†Cassidea (Semicassis) calantica Deshayes 1835
†Cassidea (Semicassis) mekranica Vredenburg 1925
†Cassidea (Semicassis) ormarensis Vredenburg 1925
†Cassidea (Semicassis) vandervierki Martin 1933
†Morio tuberculatus trituberculatus Weaver 1912
†Phalium (Semicassis) miolaevigata Sacco 1890
†Phalium (Semicassis) tuberculiformis Gabb 1864
Subg. Semicassis (Antephalium) Iredale 1924
†Semicassis aldrichi Dall 1890
†Semicassis angasi Iredale 1927
Semicassis bisulcata Schubert and Wagner 1829
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Invalid names: Cassis (Semicassis) quilonensis Dey 1961 [synonym], Cassis japonica Reeve 1848 [synonym], Phalium (Semicassis) dalrymplei Cox 1948 [synonym], Semicassis pila Martin 1899 [synonym]
Semicassis centiquadrata Valenciennes 1832
†Semicassis deneseplicata Martin 1916
Semicassis faurotis Jousseaume 1888
Semicassis granulata Born 1778
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Invalid names: Phalium (Tylocassis) inflata Shaw 1811 [synonym], Phalium alligator Petuch 1991 [synonym], Phalium loxahatcheensis Petuch 1994 [synonym], Semicassis (Tylocassis) inflata waltonensis Mansfield 1935 [synonym]
†Semicassis harpaeformis Lamarck 1803
†Semicassis labiata Perry 1811
†Semicassis monilifera Sowerby 1846
†Semicassis oligocalantica Vredenburg 1925
†Semicassis ovulum Ortmann 1900
Semicassis pyrum Lamarck 1822
†Semicassis pyshtensis Addicott 1976
Semicassis sculpta Sowerby 1839
†Semicassis senni Rustch 1934
Invalid names: Faurotis Jousseaume 1888 [synonym], Tylocassis Woodring 1928 [synonym], Xenogalea Iredale 1927 [synonym], Xenophalium Iredale 1927 [synonym]