Tectura persona (Rathke, 1833)
Mask limpet
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Family:  Lottiidae (lottiid limpets)
Max. size:  5 cm SHL (male/unsexed)
Environment:  benthic; brackish; marine
Distribution:  Northeast Pacific: Alaska, Canada, USA. Climate: boreal to subtropical.
Diagnosis:   
Biology:  Shell length to 5 cm and arched to 1.5 cm shell height (Ref. 95344). Found high on the beach, in deep cracks and depressions, typically in shaded and sheltered areas, often where there is freshwater seepage (Ref. 95344).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:   
 

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