Costokloedenia Abushik 1980

Abushik 1980. [New Early Devonian of primitopsids and beyrichiids from the Polar Urals and the Bolshezemelskaya tundra.] Novye Vidy Drevnikh Rastenii i Bespozvonochnykh SSSR, No. 5 1980: 37-42