Commatica phanocrossa is a moth in the Gelechiidae family. It was described by Meyrick in 1922. It is found in Brazil.
The wingspan is about 10 mm. The forewings are whitish-ochreous, with the anterior half of the costa suffused white. The plical and second discal stigmata are represented by elongate dark brown marks and approximated and there is a dark brown suboblique dash in the disc beyond these, as well as a dark brown streak along the costa from the middle to the apex, attenuated to the extremities, cut by a very oblique fine white striga from two-thirds, and marked with a black spot at the apex. There is also a narrow white terminal streak preceded by a few brownish scales and including three blackish dots. The hindwings are dark grey.