Thiotricha arthrodes is a moth of the family Gelechiidae. It was described by Edward Meyrick in 1904. It is found in Australia, where it has been recorded from New South Wales.[1]
The wingspan is . The forewings are shining ochreous whitish, posteriorly suffused with pale brownish ochreous and with a short dark fuscous costal streak at the base. There is an elongate-triangular dark fuscous costal spot before the middle, reaching two-thirds of the way across the wing, as well as an ill-defined dark fuscous fascia beyond the middle, narrowed beneath. There is an ochreous-yellow streak along the submedian fold between these and there is also an apical spot of dark fuscous suffusion. The hindwings are grey.[2]