the "pachycondyla petrosa" fossil is possibly either a queen or worker and preserved in lateral positioning. the ant has a body length of approximately and the head is . the alitrunk is long, with the ant being described as being very similar to members of the genus "mesoponera", formerly considered a subgenus of "pachycondyla". where preserved the generally triangular mandibles have large blocky teeth and comprise less than half the length of the head. the petiole is a triangle in side view, with a high scale, and a rounded apex.