Nemegtbaatar

Name meaning:

Hero from Nemegt

Period of life:

85–71 mya

Period:

Cretaceous period

Habitat:

Deserts and semi-deserts

Taxonomy:

Mammals

Countries:

Cretaceous period Nemegtbaatar | 3D Dinopedia

Deinosuchus

Euoplocephalus

Nemegtbaatar ()

Nemegtbaatar is one of the ancient mammals that lived in what is now Mongolia during the Cretaceous period. Its remains were first discovered in the Nemegt Valley, in the northwestern part of the Gobi Desert — a place often called the «Valley of Dragons» because of the abundance of dinosaur and other prehistoric fossils. The animal’s name is derived from this region.

Nemegtbaatar belonged to the order Multituberculata — a group of rodent-like mammals that existed for more than 160 million years and were found in Asia, North America, and Australia. These animals were among the most successful and widespread mammals of their time.

In appearance, Nemegtbaatar resembled a gerbil, though by multituberculate standards it was relatively large. Its skull reached about 4.5 centimeters in length. Based on its dentition, it likely fed on plant material — seeds, nuts, and succulent plant parts. A distinctive feature of multituberculates was the last lower premolar: large, elongated, and covered with numerous cusps. This specialized “chewing tool” allowed the animal to efficiently crush and grind hard food.

From the structure of the pelvic bones, scientists have suggested that Nemegtbaatar was viviparous — females gave birth to live young and nursed them with milk, like modern mammals. They likely raised their offspring in deep burrows, where conditions were safe and cool. Most likely, these animals remained underground during the day and emerged only at night, when the daytime heat subsided.

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