Home > Invertebrates > Bivalves > Isognomon californicus

Updated 8/20/2025

Family Isognomonidae

HAWAII - ENDEMIC

Isognomon californicus   

Kapoho Point, Kailua, Oahu

 

Makai Pier, Waimanalo, Oahu

Diamond Head, Oahu

 


Ho'okena, Hawaii

Kuki'o, Hawaii
   

BLACK PURSE SHELL

Common in rocky crevices in the splash zone.  Attains 1.5 inch.  Endemic to Hawaii.  Contrary to the species name it does not occur in California.