Cassis (gastropod)
Cassis, common name the helmet shells, is a genus of very large sea snails, marine gastropod mollusks in the family Cassidae, the helmet shells and their allies. This is the type genus of the subfamily Cassinae. Species The genus Cassis includes extant and extinct species: Cassis abbotti Bouchet, 1988 † Cassis altispira Beu 2010 † Cassis birmanica Vredenburg 1921 † Cassis brasili (Cossmann & Pissarro, 1905) † Cassis calusa Petuch and Berschauer 2018 Cassis cornuta (Linnaeus, 1758) † Cassis costulifera Beu 2010 † Cassis delta Parker 1948 † Cassis depressior Martin 1879 Cassis fimbriata Quoy & Gaimard, 1833 Cassis flammea (Linnaeus, 1758) † Cassis flintensis Mansfield 1940 † Cassis floridensis Tucker and Wilson 1932 † Cassis glaucoides Martin 1879 † Cassis herklotsi Martin 1879 † Cassis ketteri Parodiz and Tripp 1992 Cassis kreipli Morrison, 2003 † Cassis lelongi Gain, Belliard & Le Renard, 2017 † Cassis maccormacki Olsson 1928 Cassis madagascariensis Lamarck, 1822 † Cassis mammillaris Grateloup 1927 Cassis nana Tenison-Woods, 1879 † Cassis nigellensis Gain, Belliard & Le Renard, 2017 Cassis norai Prati Musetti, 1995 Cassis nummulitiphila Sacco 1890 † Cassis parfouruorum Gain, Belliard & Le Renard, 2017 Cassis patamakanthini Parth, 2000 † Cassis powelli Petuch and Berschauer, 2018