Rostrochonch Fossils
From Ohio History Central
Revision as of 17:11, 24 April 2013 by Unknown user (talk)
Rostrochonchs are a class of mollusks that until fairly recently were classified as clams, which they resemble. They range from Cambrian to Permian and are found in Ordovician, Devonian, Mississippian, and Pennsylvanian rocks.
