Parainoceramyan. gen. forParainoceramusCox, 1954 (exVoronetz, 1936)partim(Bivalvia, Jurassic)

Abstract

AbstractSeveral Jurassic pterioid bivalve species have been referred toParainoceramusCox by different authors, yet this has proved inadequate because the meaning of such genus has been compounded by nomenclatural and idiomatic problems, as well as misinterpretations. Hence, the new genusParainoceramyais here proposed to accommodate several species previously referred toParainoceramus, withCrenatula ventricosaJ. de C. Sowerby as its type. Permian species originally assigned toParainoceramus, including the type species, are referred to the genusKolymiaLikharev. All species attributed toParainoceramuss.l. are reviewed and the new genus is compared with related genera. As here understood, the new genus is first recorded in the Hettangian and attained a cosmopolitan distribution; its last occurrence is probably Berriasian.