The
anatomical line that is parallel with the longitudinal
body axis and the shortest among the anatomical lines that extend between the anterior and posterior margins 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.