The present article describes four species of the genus Buxtonia (three of them newly established), originating from the Lower Carboniferous of the Alapaevsky region of the eastern slope of the Urals (collection of L. S. Librovich, supplemented by the author's collections).

The deposit lies among dislocated and metamorphosed sedimentary-volcanogenic rocks of Paleozoic age (Valerian Formation), which have a monoclinal bedding with a westward dip at an angle of 40-45°. The deposit consists of three stratum-shaped ore bodies occurring in accordance with volcanogenic-sedimentary rocks: Western, Eastern and Southeastern. The age of the ore-bearing strata of the Sarbaiskoye deposit has so far been determined by foraminifera from the core of the well located near the Western ore body (middle-upper Visenian to Lower Namur). Our faunal discovery belongs to the tuffite horizon composing the hanging wall of the Eastern ore body ...