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New 90-Million-Year-Old Mammal Species Discovered in Mongolia

5/8/2025

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Summary

Story summary

A groundbreaking discovery in Mongolia's Gobi Desert has unveiled a new zhelestid mammal species, Ravjaa ishiii, dating back 90 million years to the Cretaceous period. This tiny creature, the first of its kind found in the Bayanshiree Formation, sheds light on the evolution of mammals during the Mesozoic era, as detailed in Acta Palaeontologica Polonica.

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Story summary

A groundbreaking discovery in Mongolia's Gobi Desert has unveiled a new zhelestid mammal species, Ravjaa ishiii, dating back 90 million years to the Cretaceous period. This tiny creature, the first of its kind found in the Bayanshiree Formation, sheds light on the evolution of mammals during the Mesozoic era, as detailed in Acta Palaeontologica Polonica.