The
ridge that is on the anterior section of the
dorsal flange and serves as the site of insertion of T9-2nd valvifer
muscle part b.
written by: Eggs, B., S. Fischer, M. Csader, I. Mikó, A. Rack, and O. Betz. 2023. Terebra steering in chalcidoid wasps. Frontiers in Zoology 20:26.