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Biochronological significance of Amynodontidae (Mammalia, Perissodactyla) from the Paleogene of Kazakhstan

Five taxa of amynodontid rhinoceroses have been named from Kazakhstan. We consider only two of these valid, and recognize three amynodontid taxa from Paleogene deposits in Kazakhstan: Cadurcodon ardynensis (=Cadurcodon zaisanensis; =Amynodon tuskabakensis) from the upper Eocene (Ergilian)-lower Oligocene (Shandgolian) of the Zaysan basin, Zaisanamynodon borisovi, from the Ergilian of the Zaysan basin and Cadurcodon kazakademius, from Shandgolian strata in the vicinity of the Chelkar-Teniz lake basin. Gigantamynodon akespensis, from the upper Oligocene north of the Aral Sea is a rhinocerotid, not an amynodontid. Close similarity of the amynodontids of Kazakhstan to those of Mongolia and China supports direct correlation of Ergilian and Shandgolian strata across Asia.