Semicassis pyrum

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.

A shell of Semicassis pyrum, ventral view showing the parietal callus

Semicassis pyrum
A shell of Semicassis pyrum, lateral view
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily:
Tonnoidea
Family:
Cassidae
Subfamily:
Phaliinae
Genus:
Semicassis
Species:
S. pyrum
Binomial name
Semicassis pyrum
(Lamarck,1822)

References
    • Powell A. W. B., William Collins Publishers Ltd, Auckland 1979 ISBN 0-00-216906-1
    • "Semicassis pyrum". Gastropods.com. Retrieved 16 January 2019.


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