The wingspan is 4.5–5.5 mm for males and 5.2–5.6 mm for females. The thorax, tegulae and forewings are uniform shining dark grey with strong blue reflections. There is an inconspicuous tornal spot consisting of a few white scales. The hindwings are pale grey.Phylogeny and host-plant relationships of the Australian Myrtaceae leafmining moth genus Pectinivalva (Lepidoptera, Nepticulidae), with new subgenera and species
