The basal part of the uropoda can be seen from below, with the convex being always above.

The frass is deposited in the basal part of the mine.

It is covered with yellowish-brown felt at the basal tubular part.

Almost all frass is ejected through an opening in the basal part of the mine.

Its basal part, called a calamus, is embedded in the skin.

In the female, the basal part of all the vertical fins are black.

The dark brown basal part is about 18 mm.

Pupation takes place in the basal part of the dry stem.

The basal part of the plant is not known, preventing a full reconstruction.

The frass is concentrated in the basal part of the blotch.