Cassis (gastropod)
| Cassis Temporal range: Paleocene - Recent |
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| A shell of Cassis cornuta | |
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| 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 |
| Synonyms | |
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Cassidea Bruguière, 1789 |
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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. This is the type genus of the subfamily Cassinae.
The genus Cassis includes 11 extant species and about 20 extinct species:
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).
Species brought into synonymy:
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