The North Pacific Miocene record of Mytilus (Plicatomytilus), a new subgenus of Bivalvia

Abstract

A new subgenus of large plicate fossil mussels of the North Pacific, Mytilus (Plicatomytilus) n. subgen., includes three distinct species, Mytilus (P.) middendorffi Grewingk, 1850, Mytilus (P.) gratacapi n. sp., and Mytilus (P.) n. sp. This extinct subgenus ranged from central California to western Kamchatka during the Miocene.