The petiolar node relatively quadrate and subpetiolar process broad in profile with a blunt anterior angle and an acute posterior angle. Used in Antkey to separate Gnamptogenys triangularis from Gnamptogenys porcata.
The petiolar node tall and narrow and the subpetiolar process narrow with a blunt posterior angle and lacking a distinct anterior angle. Used in Antkey to separate Gnamptogenys porcata from Gnamptogenys triangularis.
The petiole is apedunculate and approximately as tall and it is long in profile view. The posterior face is weakly but distinctly concave. Used in Antkey to separate Platythyrea parallela from other ponerine species.
The petiolar node greatly reduced or absent, the anterior face absent or at most indistinct. Used in Antkey to separate Brachymyrmex, Tapinoma and Technomyrmex from various other genera in Dolichoderinae and Formicinae.