Nemegtbaatar is a genus of mammal from the Upper Cretaceous Period of what is now Mongolia. It existed in the company of much larger dinosaurs, found together in the Nemegt Basin. This creature was a member of the extinct order Multituberculata. It's within the suborder Cimolodonta and is a member of the superfamily Djadochtatherioidea. The genus Nemegtbaatar is known by the species Nemegtbaatar gobiensis found in the Campanian (Upper Cretaceous) Barun Goyot Formation of Mongolia. Nemegtbaatar was a relatively large member of Djadochtatherioidea, with a skull length of up to 4.5 cm. At least one specimen is in the Institute of Paleobiology collection of the Polish Academy of Science at Warsaw.
Shirou's History Fact
About the size of a modern day squirrel, a mammal that lived in the trees and fed on leaves and fruits. The family that the nemegtbaatar belonged to, the multituberculata family, used to flourish in the northern hemisphere. However, dus to the rise of the rodentia family in the eocene epoch, all of them were wiped out.