Six species of Pinna are known from Cretaceous deposits of the Pacific Coast region of North America. These include: P. calamitoides Shumard, P. brewerii Gabb, P. pontica Anderson, P. equivillana Anderson, P. kotsinensis Packard and Jones, n. sp., and P. alaskana Packard and Jones, n. sp.

You do not currently have access to this article.