New Species of Crassatina (Bivalvia) from the Middle and Upper Eocene of Ukraine

Abstract

Representatives of the genus Crassatina from the Upper Eocene Mandrikovka Beds in the vicinity of Dnepr (former Dnepropetrovsk) are discussed and figured. From the Mandrikovka assemblage, two new species, C. conquisita and C. insolita, are described. One more new species, C. subcostata, is described from the Middle Eocene deposits of southern suburbs of Krivoi Rog. Two species, C. raricostata (Klushnikov) and C. expolita (Klushnikov), which were originally established as varieties, are redescribed and their species rank is substantiated.