Original description
A. N. Riabinin. 1931. Ostatki dinozavrov iz verkhnego mela nizov'ev r. Amu-Dar'i [On the dinosaurian remains from the Upper Cretaceous of the lower parts of the Amu-Daria River]. Zapiski Rossiyskogo Mineralogicheskogo Obshchestva 60(1):114-118