The anatomical line that connects the global minima of the contour line of the pronotal slope in lateral view when the specimen is rotated until the contour line becames as symmetric as possible and the posteriormost point of the propodeal lobe.
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.