Pachycondyla petiolosa is an extinct species of ant in the formicid subfamily Ponerinae described by from a fossil found in Europe.

The area is a preserved maar lake which initially formed approximately 47 million years ago as the result of volcanic explosions.

The fossils were described by Gennady Dlussky and Sonja Wedmann in a 2012 paper on the poneromorph ants of Messel.

In the type description Dlussky and Wedmann named the species P. petiolosa, with the specific epithet derived from the Latin "petiolosus", chosen in recognition of notably visible petiole.

The antennae scape extends just beyond the occipital margin of the head, and the funicular segments in the middle are longer than wide.