Phytoliriomyza pittosporophylli is an Australian species of fly in the family Agromyzidae.
Phytoliriomyza pittosporophylli and the similar-looking P. pittosporocaulis both have a pale frons, a lunule approximately in the form of a semicircle, reclinate orbital setulae, a black scutellum, pale halteres, and dorso-central bristles in a 3+1 arrangement. It can be distinguished from P. pittosporocaulis by the third antennal segment being entirely black.
The larva has 8-10 bulbs in each posterior spiracle; this differs from the 4-6 bulbs of P. pittosporocaulis.
Full descriptions of the adult and larva (and the gall produced by the latter) were given by Hering.
Larvae of this species form circular leaf galls on sweet pittosporum (Pittosporum undulatum). Galls are usually near the midrib but can also occur elsewhere in the leaf.