PERMIAN BIVALVES FROM THE TRANSBAIKAL REGION

Abstract

Permian bivalves of the Transbaikal Region were monographically treated for the first time. Seven biostratigraphic units ranked as «beds with fauna» were correlated with the Permian bivalve zonation for northeastern Asia. Plates of 18 species are given and six new species, Palaeoneilo postolegi, Polidevcia jamesi, P. zabaikalica, Leptodesma indistincta, Streblopteria alenae,and Cyrtorostra nana, are described.