Petiole miner etc. (Diptera: Agromyzidae) in Aralia

I observed four plants with leaf stalk mines in a colony of the host plant in 2021. The mine on one of these plants appeared to begin at the base of one of the leaflets, then proceed down the leaflet stalk to the main stalk or petiole of the leaf. A black puparium had been formed under the epidermis in the distal portion of the petiole, just below the point where the leaflet stalks attached. No puparia were visible in the mines on the other three plants. Observations of similar mines at a location outside the study area suggested that this fly may sometimes move into the rhizome and pupate there.