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 female T9.
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.