Leaf snap galls are uncommonly found on E. graminifolia ... and we were unable to rear adults from them. We attribute these galls to A. pesudorosa based on the pupal morphology and on the similar situation observed in A. solidaginis and A. rosulata sp. nov., where the same species induces both snap and bud galls on its host plant.

[this species was originally described by the authors of this paper; please refer to it for many more details of gall biology, insect life history, anatomy, and phylogeny]

Gall composed of two leaves joined together and forming a green blister where they join...Asphondylia sp.

Galls are similar to those formed on Solidago by Asphondylia solidaginis. The gall maker is evidently multivoltine. Host: E. graminifolia.