Phyllonorycter aarviki is a moth of the Gracillariidae family. It is found in Tanzania and Yemen. The habitat consists of dry semi urbanized areas along the Indian coast and in eastern Africa. The length of the forewings is 2.3 mm. The forewing ground colour is bright ochreous with blackish fuscous markings. The hindwings are pale grey with a long pale fuscous fringe of the same shading than the hindwing. Adults are on wing in late March (eastern Africa) and in early May (coast of the Arabian Peninsula).