MolluscaBase source details
Gerasimov P.A. (1969). Upper Substage of the Volgian Stage of the central areas of the Russian Platform. Moscow: Nauka. 144 pp. [In Russian].
401003
Gerasimov P.A.
1969
Upper Substage of the Volgian Stage of the central areas of the Russian Platform
Moscow: Nauka
144 pp. [In Russian]
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Ampullospira brevis (Gerasimov, 1955) † (additional source)
Calyptraea petasus Gerasimov, 1969 † (original description)
Pictavia congrua (Eichwald, 1861) † accepted as Oonia congrua (Eichwald, 1861) † (basis of record)
Calyptraea petasus Gerasimov, 1969 † (original description)
Pictavia congrua (Eichwald, 1861) † accepted as Oonia congrua (Eichwald, 1861) † (basis of record)
