Asteromyia gutierreziae is a species of gall midges in the family Cecidomyiidae.
They are black, about 3-5mm long and found on upper leaves, lower leaves and the stem.[1]
They can cause galls, on such plants as Medranoa palmeri (Texas Desert Goldenrod),[2] Baccharis angustifolia, Baccharis sarothroides, Gutierrezia californica, Gutierrezia microcephala, Gutierrezia sarothrae and Gymnosperma glutinosum.