This species is restricted to the Lac Tsimanampetsotsa region of south-western Madagascar. It has been recorded from the edge of the Mahafaly Plateau north and further south to near the Linta River (Goodman 2003; Mahazotahy et al. 2006). The altitudinal range is 35-145 m (Mahazotahy et al. 2006). A recent model calculated the range at 442 km² (Mahazotahy et al. 2006).