Paleontologists working in the Pondaung Formation of central Myanmar have unearthed the near-complete fossilized remains of a previously unknown species of pygmy rhinoceros dating to the Eocene epoch. Named Pondaungyrhinus minusculus, the herbivore was roughly the size of a large dog, representing one of the smallest rhinocerotids ever discovered. The fossil provides critical data on the early diversification of perissodactyls in Southeast Asia during a period of intense global warming.
Analysis of the specimen's dental structure suggests a diet of soft tropical vegetation, differing significantly from the grazing habits of modern rhinoceroses. CT scans of the fossilized skull revealed a unique cranial morphology that lacks the prominent nasal horn found in later species, highlighting a transitional phase in rhino evolution. This discovery reinforces the Pondaung region's status as a global hotspot for understanding Eocene mammalian evolution.