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Atrina triangularis

Bivalvia - Ostreida - Pinnidae

Taxonomy
Atrina triangularis was named by Zinsmeister (1983). Its type specimen is UC 6832/1, a shell, and it is a 3D body fossil. Its type locality is Runkle Canyon, which is in a Thanetian marine conglomerate in the Simi Formation of California.

Sister species lacking formal opinion data
A. gravida, A. rioturbiensis, A. sinuta, A. tuberculosa, A. zelandica