Semicassis royana (Iredale, 1914)
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Family:  Cassidae (helmet and bonnet shells)
Max. size: 
Environment:  demersal; marine
Distribution:  Southwest Pacific: Australia, New Zealand and Kermadec.
Diagnosis:   
Biology:  Dead shell was found on the beach (Ref. 88739).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans:  harmless
Country info:   
 

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