Semicassis pyrum
From Infogalactic: the planetary knowledge core
| Semicassis pyrum | |
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| File:Semicassis pyrum (top).JPG | |
| A shell of Semicassis pyrum, lateral view | |
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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)
A shell of Semicassis pyrum, ventral view showing the parietal callus
References
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<references />, or <references group="..." />- Powell A. W. B., William Collins Publishers Ltd, Auckland 1979 ISBN 0-00-216906-1
- http://www.gastropods.com/7/Shell_2787.shtml
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