Brachiopods of the Superfamily Richthofenioidea (Productida) from the Permian of Darvaz Range, Tajikistan

The Permian brachiopods of the superfamily Richthofenioidea Waagen, 1885 (order Productida) were obtained from the Gundara formation, Kubergandian regional stage of the Darvaz Range, Tajikistan. The collection contains Gundaria insolita Angiolini et al., 2016, Hercosestria sp., Coscinarina sp., and Proteguliferina sp. The peculiarities of the shell preservation are described. An individual age of the brachiopods is determined by the growth rings. The shell interior and exterior were studied using various techniques including the X-ray microtomography.