Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Abstract

Carole S. HICKMAN (2023). Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs.Cover: Byssally attached mud pectens and free-living glass scallops are abundant throughout the Keasey Formation, occurring in small clusters at many localities. Although they are seldom well preserved, microscopic sculpture of the thin, delicate shells is ornate and taxonomically diagnostic. Shells are sometimes partially articulated, and preserve drill holes of juvenile carnivorous naticid gastropods.