| Semicassis pyrum | |
|---|---|
| .JPG.webp) | |
| A shell of Semicassis pyrum, lateral view | |
| Scientific classification  | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Subclass: | Caenogastropoda | 
| Order: | Littorinimorpha | 
| Family: | Cassidae | 
| Genus: | Semicassis | 
| Species: | S. pyrum | 
| Binomial name | |
| Semicassis pyrum (Lamarck,1822) | |
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.webp)
A shell of Semicassis pyrum, ventral view showing the parietal callus
References
- Powell A. W. B., William Collins Publishers Ltd, Auckland 1979 ISBN 0-00-216906-1
- "Semicassis pyrum". Gastropods.com. Retrieved 16 January 2019.
 Media related to Semicassis pyrum at Wikimedia Commons
 Media related to Semicassis pyrum at Wikimedia Commons
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