JURASSIC GASTROPODS OF EUROPEAN RUSSIA (ORDERS CERITHIIFORMES, BUCCINIFORMES, AND EPITONIIFORMES)

Abstract

The study is devoted to Jurassic gastropods of the Central and Central Chernozem regions of Russia. Thanks to the exact locality data on the collected material, the stratigraphic ranges of many species were refined. Several beds are recognized by the change in the dominant gastropod species in the Middle and Upper Jurassic clay sediments. Detailed characteristics of facial distribution of gastropod taxa are given. New material displays a high diversity of gastropod species. The study covers 42 species of 16 genera from 8 families (among them, 1 family, 1 subfamily, 5 genera, 1 subgenus, and 18 species are new).