1000 Tögrög Golden Nimravidae

Nimravidae — often called "false saber-tooths" — were not true felids but occupied an almost identical ecological niche across North America and Eurasia from the Eocene through the Miocene, a case of convergent evolution that still generates taxonomic argument. Mongolia's numismatic program has leaned heavily into paleontological subjects since the early 2000s, reflecting the country's status as one of the world's most productive fossil-bearing territories — the Gobi Basin alone has yielded type specimens for dozens of Cretaceous and Cenozoic genera.