the "pachycondyla eocenica" holotype specimen is a partially preserved adult queen, which was fossilized as a lateral impression, missing portions of the legs and wings. the paratype is a very partial dorsal impression, preserving only the head, either of a gyne or a worker. the overall length of the queen is approximately and the head has an estimated length of . the antennae are slender in appearance, composed of a scape which extends nearly to the edge of the rear margin of the head. the eyes are rounded in outline and placed to the front of the midpoint on the head. the shape of the petiole scale is rounded on the top edge, as is that of both "p. messeliana" and "p. succinea", but it is larger than "p. succinea" and smaller than "p. messeliana".