When was evidence of the Catopsbaatar first found?
Catopsbaatar
Catopsbaatar is a genus of multituberculate, an extinct order of rodent-like mammals. It lived in what is now Mongolia during the late Campanian age of the Late Cretaceous Period, about 72 million years ago. The first fossils were collected in the early 1970s, and the animal was named as a new species of the genus "Djadochtatherium " in 1974, "D. catopsaloides". The specific name refers to the animal's similarity to the genus "Catopsalis". The species was moved to the genus "Catopsalis" in 1979, and received its own genus ("Catopsbaatar", Greek and Mongolian for "visible hero") in 1994. Five skulls, one molar, and one skeleton with a skull are known; the latter is the genus' most complete specimen. "Catopsbaatar" was a member of the family Djadochtatheriidae.
History of Ulaanbaatar
Human habitation at the site of Ulaanbaatar dates from the Lower Paleolithic. Alexey Okladnikov's archeological work in 1949 and 1960 revealed many Paleolithic sites on Mt. Bogd Khan Uul, Buyant-Ukhaa and Mt. Songinokhairkhan. In 1962 various Paleolithic tools were discovered at Mt. Songinokhairkhan as well as Buyant-Ukhaa (23 stone tools) that scholars date from 300,000 years ago to 40,000-12,000 years ago. Okladnikov also revealed an Upper Paleolithic (40,000-12,000 years ago) site on the south-east base of the Zaisan Hill on the northern edge of Mt. Bogd Khan Uul. Byambyn Rinchen mentions it as an inspiration for his prehistoric novel "Zaan Zaluudai". The lower strata of this bistratified settlement located at the present-day Zaisan Memorial revealed tools and materials fashioned according to the Levallois technique. These Upper Paleolithic people hunted mammoth and woolly rhinoceros, the bones of which are found abundantly around Ulaanbaatar.