Phytoliriomyza pittosporocaulis

Phytoliriomyza pittosporocaulis and the similar-looking P. pittosporophylli 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.^[3][4] It can be distinguished from P. pittosporophylli by the third antennal segment being largely yellow.^[3][4]

The larva has 4-6 bulbs in each posterior spiracle; this differs from the 8-10 bulbs of P. pittosporophylli.^[5]

Full descriptions of the adult and larva (and the gall produced by the latter) were given by Hering.^[5]

Larvae of this species form twig galls on sweet pittosporum (Pittosporum undulatum).^[3][4] These galls are up to 5.7 mm in diameter and semi-ovoid or hemispherical in shape.^[5] Sometimes multiple galls occur together with overlapping edges.^[5]