Inoceramus ("Strong Pot")'s an extinct genus of fossil marine pteriomorphian bivalves that superficially resembled the related winged pearly oysters of the extant genus Pteria. The species of Inoceramus enjoyed a worldwide distribution during the Cretaceous period. Many examples are found in the Pierre Shale of the Western Interior Seaway in North America. Inoceramus can also be found abundantly in the Cretaceous Gault Clay that underlies London. Other locations for this fossil include Vancouve… (More on Inoceramus)