Phyllonorycter ruizivorus is a moth of the Gracillariidae family. It is found on La Réunion island in the Indian Ocean. The length of the forewings is 2.8–2.91 mm. The forewings are golden ochreous with white markings consisting of a very short basal streak, two transverse fasciae, one costal and one dorsal strigulae and two terminal spots. The hindwings are light fuscous with a long greyish fringe.