Acta Palaeontologica Polonica

New Late Cretaceous mammal locality in Mongolia and a description of a new multituberculate

Zofia Kielan-Jaworowska and Demberlyin Dashzeveg

Acta Palaeontologica Polonica 23 (2), 1978: 115-130

A multituberculate Tugrigbaatar saichanensis gen. n., sp. n., assigned to the Eucosmodontidae is described on the basis of a skull and fragments of postcranial skeleton. It resembles a eucosmodontid from the Djadokhta Formation, Kryptobaatar dashzevegi, with which it is compared in detail. A multituberculate humerus is reconstructed. The Toogreeg beds cropping out at the locality of Toogreeg in the Gobi Desert (ca. 30 km WNW of Bayn Dzak) yield late Cretaceous mammals. The age of the beds is tentatively estimated as approximately equivalent to that of the Djadokhta Formation (?late Santonian and/or ?early Campanian).

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