Overview
- A peer-reviewed description published on Wednesday, November 11, 2026, names the new species Yakamys sirindhornae based on two teeth recovered from the Bang Mark Pit in Krabi Province, southern Thailand.
- The fossil material consists of a lower second molar and a fragment of a lower incisor found in a clay layer within a coal seam at the Krabi lignite mine.
- Researchers assigned the animal to the early rodent family Ischyromyidae using tooth shape and the incisor's unusually thin enamel, measured at about 235 micrometers.
- The team used seven established dental formulas to estimate body mass and report a ballpark figure of roughly 30 kilograms while stressing large uncertainty from such limited material.
- If confirmed by more fossils, the find would push the origin of large-bodied rodents back to the Late Eocene in Southeast Asia and highlight the Krabi Basin as an important site for Paleogene mammal discoveries.