Scientists identify giant prehistoric rat from Thailand fossils
Researchers in Thailand identified a new giant rodent species from fossil teeth found in southern Krabi province.
The ancient animal weighed about 30 kilograms and lived 33 to 35 million years ago in the region. Scientists analyzed two teeth discovered decades ago at a coal mine site in the area. These fossils represent one of the largest known rodents from the Paleogene geological period globally.
A geologist initially mistook the large incisor for a bone before recognizing it as a tooth. She later found a matching molar while exploring the dark coal deposits alongside other expedition members. The cream-colored fossils stood out clearly against the surrounding dark geological material found there.
Modern researchers from Thailand, France and Canada used detailed analysis to finally name this extinct species. The animal belonged to the Ischyromyidae family, which was one of the oldest major rodent lineages. This discovery offers fresh insights into how early rodents developed to massive dimensions in history.
The species name Yakamys sirindhornae honors Princess Sirindhorn for her strong support of scientific and paleontological research efforts. Although only two teeth were recovered, the findings suggest ancient rodents may have evolved in this location. More study is needed to understand the diet and behavior of this unique prehistoric creature.
“At first, I thought it was a bone. I showed it to my supervisor, who told me it was a giant rat's tooth”