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Order Archaeogastropoda
http://animaldiversity.ummz.umich.edu/mollusca/gastropoda/archaeogastropoda.html
Images and brief description. Species accounts for Haliotis kamtschatkana (Northern Abalone) and H. rufescens (Red Abalone).
Worldwide Abalone Distribution
http://www.uct.ac.za/depts/zoology/abnet/species.html
Global distribution of abalone.