Abstract---The evolution of the superfamily Popanocerataceae is studied. The nominative family Popanoceratidae includes two superfamilies (Popanoceratinae and Pamiropopanoceratinae). The study of the most recent finds of Roadian ammonoids allowed the establishment of a new stage of active morphogenesis in the family Mongoloceratidae, which includes the new genus Biarmiceras, combining characters connecting two subfamilies of Popanocerataceae. Five species are described: Biarmiceras tumarense (Ruzhencev), B. subtumarense (Andrianov), B. esaulovae sp. nov., B. kremeshkense sp. nov., and B. barskovi  sp. nov. from the Kungurian--Roadian of northeastern Russia and the Kazanian of the Volga-Urals Region.