GaotegeBed Fm

The type section is located on the Gaotege Ula hill (E115°26′, N43°29′), about 12 km northwest of the Bayan Ula hill and 80 km southwest of the city of Xilinhot, central Nei Mongol. It is derived from the Gaotege section described by Li et al. (2003). It was named by Qiu et al. (2013, in Wang et al., 2013).

The Gaotege section and fauna was firstly discovered by Teilhard de Chardin and Emile Licent in their geological reconnaissance tour of Nei Mongol and Hebei in 1924 (Teilhard de Chardin, 1926a, b).

The Gaotege Bed is characterized by a series of light colored fluvial and lacustrine deposits formed by sandstones, siltstones, mudstones, and marlstones. It contains abundant fossil mammals, fishes, amphibians, reptiles, and freshwater mollusks. Its thickness is more than 70 m.

Mammals: Erinaceus sp., Yanshuella primaeva, Desmana sp., Sorex ertemteensis, Sorex pseudoalpinus, Sorex sp., Petenyia katrinae, Lunanosorex cf. L. lii, Sulimskia cf. S. ziegleri, Tamias ertemtensis, Sinotamias gravis, Eucastor plionicus, Dipoides majori, Castor anderssoni, Sinozapus volkeri, Sicista ertemeteensis, Paralactaga suni, Brachyscirtetes robustus, Dipus pliocenicus, Sinocricetus progressus, S. major, Nannocricetus mongolicus, Pseudomeriones abbreviatus, P. complicidens, Mimomys telhardi, M. orientalis, Borsodia mengensis, Chardina gansuensis, C. truncatus, Apodmeus lii, A. qiui, Chardinomys yusheensis, Huaxiamys downsi, Allohuaxiamys gaotegeensis, Micromys tedfordi, Pararhizomys hipparionum, Trischizolagus sp., Ochotona sp., Chasmaporthetes sp., Nyctereutes sp., ?Eucyon sp., Lutra sp., Pannonictis sp., Mustela sp., Hipparion insperatum, H. huangheense (Li et al., 2003; Pan et al., 2011; Qiu and Li, 2016)

It is interpreted as a river-lake environment.