The anatomical line that is the longest between the ventral margin of the petiole and the dorsalmargin of the petiole and is perpendicular to the ventral margin of the petiole in lateral view.
written by: Csősz, S., J. Heinze, and I. Mikó. 2015. Taxonomic Synopsis of the Ponto-Mediterranean Ants of Temnothorax nylanderi Species-Group. PLoS ONE 10:e0140000.