Bulganbaatar
Scientific classification
Kingdom: Animalia
Therapsida
Class: Mammalia
Order: Multituberculata
Superfamily: Djadochtatherioidea
Genus: Bulganbaatar
Species
  B. nemegtbaataroides

Ref.

Bulganbaatar is a Central Asian mammal genus from the Upper Cretaceous. It existed in the company of dinosaurs. This animal was a member of the extinct order of Multituberculata.
For those of a technical inclination, it's within the Suborder of Cimolodonta, and a member of the superfamily Djadochtatherioidea.

Genus: Bulganbaatar Kielan-Jaworowska Z, 1974

Species: Bulganbaatar nemegtbaataroides Kielan-Jaworowska Z, 1974
Place: Djadokhta Formation
Country: Mongolia & Kazakhstan?
Age: Upper Cretaceous
Remarks: I’ve seen indications that there might be a second, unnamed species.
Reference: Kielan-Jaworowska (1974), Multituberculate succession in the Late Cretaceous of the Gobi Desert (Mongolia). Palaeontologica Polonica, 30, p.23-44.

Page references: Kielan-Jaworowska Z & Hurum JH (2001), Phylogeny and Systematics of multituberculate mammals. Paleontology 44, p.389-429.

(This information has been derived from [1] MESOZOIC MAMMALS; Djadochtatherioidea, an internet directory. As that's my webpage, there are no issues of copyright. Trevor Dykes)