This species occupies a discontinuous range in the province of Central Sulawesi. Northern and southern populations are isolated from each other by the Palu Bay, the city of Palu, and the southern parts of the Isthmus of Palu, an area now inhabited by the parapatric species T. dentatus. The current evidence indicates that the northern population occurs within the following geographic limits: an unknown line just west of the village of Tomini to the northeast (about 120º30'E), the coastlines of the Isthmus of Palu to the east and tho the west, and an unknown line between the village of Ampibabo and Marantale to the south (about 0º30'S). Along its northern border, this population borders the “Sejoli form” sensu Shekelle et al. (1997). At its southern limit, this population borders T. dentatus (Merker et al. 2010).
The southern population occurs southwest to west of Palu, it is definitely known from the type locality Uwemanje only and probably occurs in a very small area from Uwemanje to the west. Approximately 9 km to the south T. dentatus is found, and 24 km to the northwest, T. lariang (Merker et al. 2010).