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| Semicassis pyrum | |
|---|---|
.JPG)
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| A shell of Semicassis pyrum, lateral view | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Cassidae |
| Genus: | Semicassis |
| Species: | S. pyrum
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| Binomial name | |
| Semicassis pyrum (Lamarck,1822)
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Semicassis pyrum, common name the "pear bonnet" or "common helmet", is a species of large sea snail, a marine gastropod mollusc in the family Cassidae, the helmet shells, bonnet shells and their allies.
.JPG)