This species occurs in southern and central Sulawesi, Indonesia. The first specimen of T. pumilus was collected in 1916 at 1,800 m from Rano Rano, in the mountains between Palu and Poso. The second specimen, collected in 1930, came from 2,200 m on Mount Rantemario in South Sulawesi. A third specimen, which was found dead in a rat trap in May 2000, came from 2,200 m on the flank of Mount Rorekatimbu.
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