The
flange that extends anteriorly on the
first valvifer and overlaps with the posterior
margin of the
anterior area of the second valvifer.
written by: Ernst, A., I. Mikó, and A. R. Deans. 2013. Morphology and function of the ovipositor mechanism in Ceraphronoidea (Hymenoptera: Apocrita). Journal of Hymenoptera Research.