Cassis (gastropod)

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For unrelated species named cassis, see Cassis (disambiguation) § Animals.
Temporal range: Paleocene - Recent
Cassis cornuta shell.jpg
A shell of Cassis cornuta
Cassis cornuta 01.jpg
Five views of a shell of Cassis cornuta
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Sorbeoconcha
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Tonnoidea
Family: Cassidae
Subfamily: Cassinae
Genus: Cassis
Scopoli, 1777

Cassidea Bruguière, 1789

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.[1] This is the type genus of the subfamily Cassinae.


The genus Cassis includes 11 extant species and about 20 extinct species:[1][2]

Fossils of the sea snails within this genus have been found all over the world in sediments from Paleocene to Recent (age range: 66 to 0 million years ago).[2]

Fossil shell of Cassis mammillaris

Species brought into synonymy:[1]


  1. ^ a b c d Bouchet, P. (2014). "Cassis Scopoli, 1771". World Register of Marine Species. Retrieved 24 July 2014. 
  2. ^ a b Fossilworks

External links[edit]