Pseudomyrmex satanicus (Wheeler, 1942)
Worker diagnosis. Large, HW 1.10-1.26; median clypeal lobe laterally angulate; frontal carinae subcontiguous (FCI 0.03-0.05); pronounced pit-like impression on midline of head anterior to the median ocellus; posterior margin of head straight, rounding sharply into the sides; head densely punctulate, sublucid; in dorsal view propodeal spiracles salient, protruding laterally; petiole slender; body dark brown.
Similar species. P. spinicola.
Distribution. Central Panama.
Biology. P. satanicus is a polygynous, obligate acacia-ant, known only from a few forested locations in Panama, where colonies inhabit Acacia melanoceras.