Thiotricha acrantha is a moth of the Gelechiidae family. It was described by Meyrick in 1908. It is found in India (Assam). The wingspan is about 10 mm. The forewings are shining ochreous-whitish with an acutely angulated whitish line from four-fifths of the costa to the tornus, edged anteriorly on the upper half by a blackish streak, elsewhere indistinctly with fuscous, the angle nearly reaching the apex. The apex is faintly rosy-tinged and there are small blackish dots at the apex and on the termen towards the apex. The hindwings are light grey, thinly scaled towards the base and with a dark grey apical dot.