Pogonomyrmex sylvestris-group

Workers of the P. sylvestris-group can be recognized by the following characters: (1) long acuminate spine on antero- or medioventral margin of peduncle, (2) in dorsal view, postpetiole triangular, longer than wide, (3) superior and inferior propodeal spines long, (4) in dorsal view, petiole elongate; in lateral view, petiole flattened with a crest at anterior margin that is elevated above posterior face, (5) eyes small, situated anterior to middle of head, (6) psammophore weakly developed, consisting of numerous short hairs on ventral side of head, and (7) mesosoma with at least several long flexuous hairs. Queens are unknown for all three species; males are known for only P. stefani.