Eichwald, E. (1851 ["1850"]). Paleontologiya Rossii: Novyy period. Opisaniye molassovoy i namyvnoy formatsiy. Eduard Prats, St. Petersburg, 284 pp., available online athttp://paleostratmuseum.ru/files/PaleontologyOfRussia.pdf page(s): 115, pl. 9, fig. 22 [details]
original descriptionEichwald, E. (1851 ["1850"]). Paleontologiya Rossii: Novyy period. Opisaniye molassovoy i namyvnoy formatsiy. Eduard Prats, St. Petersburg, 284 pp., available online athttp://paleostratmuseum.ru/files/PaleontologyOfRussia.pdf page(s): 115, pl. 9, fig. 22 [details]
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