Abstract
The subfamily of Biseriammininae includes genera that have kind of great species diversity in the sediments of Upper Permian in the most parts of Iran, particularly Zagros Mountains. As the complete section of Upper Permian sediments is exposed in the Zagros basin, the Oshtoran-kuh region has been selected of this study. Sections of the different genera have been drawn by camera Lucida instrument and species have been differentiated based on the structural properties of the shell. Generally, 24 species of Globivalvulina genus, 8 species of Paraglobivalvulina genus and 1 species of Paraglobivalvulinoides genus have been identified and the evolutionary pattern of these genera and their species are presented. In addition, biostratigraphic studies of revealed ten biozones based on the fuzolinids and small foraminifers identified in Dalan Formation in Zagros basin, Iran.
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