About Asteromyia euthamiae Gagné, 1968
Asteromyia euthamiae Gagné, 1968 is a species of gall midge that belongs to the family Cecidomyiidae. Entomologist Raymond Gagné first described it as a new species in 1968. It is widely distributed across northern North America, and induces gall formation on plants of the genus Euthamia. Known host species include Euthamia caroliniana, Euthamia graminifolia, and Euthamia leptocephala. The galls formed by this species are typically 3 to 10 millimeters long, and their shape changes based on the width of the host leaf. Galls may appear rounded, elliptical, or elongate-elliptical. They are most often black, but can have a distinct narrow margin colored yellow, white, or purple.
