| Semicassis thomsoni | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha |
| Superfamily: | Tonnoidea |
| Family: | Cassidae |
| Subfamily: | Cassinae |
| Genus: | Semicassis |
| Species: | S. thomsoni |
| Binomial name | |
| Semicassis thomsoni (Brazier, 1875) |
|
Semicassis thomsoni is a species of large predatory sea snail, a marine gastropod mollusc in the family Cassidae, the helmet shells and their allies.