Mystery mine on American trailplant (Adenocaulon bicolor)

Here's a mystery I've been trying to solve for a decade now: a long, linear leaf mine of an agromyzid fly on Adenocaulon bicolor in the Pacific Northwest. It should be a relatively easy one to rear, since the puparium is formed in the leaf (hidden on the lower surface) and there are apparently at least two generations per year, with mines present from June to October.

@jmole, WA, 6/9/2021

@lumenal, OR, 7/6/2021

@lumenal, OR, 7/12/2022

@lumenal, OR, 7/18/2022

@flammulated, OR, 7/22/2021

@flammulated, OR, 7/30/2021

@brnhn, WA, 8/18/2022

@kurtsteinbach, WA, 8/30/2021

@brnhn, OR, 9/5/2021

@johndreynolds, BC, 9/18/2020

Posted on October 14, 2022 03:40 PM by ceiseman