Analysis of the phylogenetics of Gnamptogenys Roger produced two most parsimonious trees. Successive weighting selected one of the two trees of the same length and topology. The alternate topology placed Gnamptogenys solomonensis as more apical and as the sister group to G. preciosa. A consensus of the two most parsimonious trees resulted in a collapse of this apical node. Several apomorphies provide strong support for the monophyly of the clade Gnamptogenys + Ectatomma + Rhytidoponera. An invariable autapomorphy for Gnamptogenys is the loss of the apical seta on the fore tibia, in contrast to Ectatomma and Rhytidoponera, which always have one. The species of the epinotalis group and the albiclava group have the following synapomorphies: the presence of a ridge along the basal mandibular margin and a continuous groove around the katepisternum. They also have a sulcus along the ventral pronotal margin, but so do the outgroup taxa Heteroponera and Platythyrea.
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