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Atrina triangularis Zinsmeister 1983

PaleoDB taxon number: 373704

Full reference: W. J. Zinsmeister. 1983. New Late Paleocene molluscs from the Simi Hills, Ventura County, Califonia. Journal of Paleontology 57(6):1282-1303

Belongs to Atrina according to W. J. Zinsmeister 1983

Sister taxa: Atrina (Atrina), Atrina (Servatrina), Atrina affinis, Atrina argentea, Atrina harrisii, Atrina jacksoniana, Atrina magellanica, Atrina maura, Atrina multicostata, Atrina nigra, Atrina pectinata, Atrina piscatoria, Atrina seminuda, Atrina serrata, Atrina stephensi, Atrina talarensis, Pinna (Atrina) alamadensis, Pinna (Atrina) bicuneata

Type specimen: UC 6832/1, a shell. Its type locality is Runkle Canyon, which is in a Thanetian marine conglomerate in the Simi Formation of California.

Average measurements (in mm): shell 150.0 x 100.0