States/Provinces Summary
Diodora aspera  in Washington, USA
Main ref. (8355). Hodgson, A.N. and F.-S. Chia, 1993. Spermatozoon structure of some North American prosobranchs from the families Lottiidae (Patellogastropoda) and Fissurellidae (Archaeogastropoda). Mar. Biol. 116:97-101. 
Status: native 
Abundance:  
Comments: Collected from San Juan Island, Washington, USA (Ref. 8355). Also in Ref. 93916. 
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