New data on Stromatoporoidea of the Emsian age in the Polar Urals (Bolshaya Usa river)

The results of the study of stromatoporoids of the Lower Devonian of the Polar Urals (Bolshaya Usa River) are presented. The data on the taxonomic composition of the Emsian stromatoproids of this area are supplemented. Species of Stellopora analoga Bogoyavl. and S. similis Bogoyavl. have been established here for the first time. The complex of stromatoporoids in combination with data on other fossil remains allows dating the studied interval of the section as the Late Emsian. The lithological composition and age of the studied section can be compared with the Early Devonian Shervozhskaya Formation.