A rat endemic to Thailand with a distribution so restricted that it is known from only a few limestone outcrops in three provinces in the centre of the country, a unique habitat currently threatened by mining.
Medium-sized, with the white belly characteristic of the genus Niviventer and darker dorsal fur; reliable identification from other white-bellied rats in the region requires skull examination, although its distribution restricted to specific limestone outcrops helps narrow it down.
It lives among cracks and caves in limestone outcrops, near the entrance of bat caves; its tracks and signs include paths through rocky vegetation and burrows in natural hollows in the limestone.
Limestone outcrops (karst) in Saraburi, Lopburi and Nakhon Sawan provinces in central Thailand; endemic to the country.
Presumed omnivorous, like other species of the genus Niviventer.
Completely tied to the limestone outcrops where it lives; it has not been recorded again at its type locality for more than three decades, suggesting a very precarious situation.
Endangered due to the extreme fragmentation of its limestone habitat, currently threatened by mining activity.
Limestone quarrying directly destroying its habitat, which is already very restricted and fragmented.
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