Pogonomyrmex cunicularius

Robert A. Johnson, 2015, A taxonomic revision of South American species of the seed-harvester ant genus Pogonomyrmex (Hymenoptera: Formicidae). Part I, Zootaxa 4029 (1), pp. 1-142 : 43

Pogonomyrmex cunicularius -group

Workers in the P. cunicularius -group are diagnosed by the following characters: (1) psammophore poorlydeveloped, consisting of short to medium-length hairs scattered across ventral side of head, (2) first gastral tergum lacking striae, (3) head elongate (CI <90.0), (4) femur long (HFL> 2.05 mm; HFI> 118.0), (5) scapes long, surpassing posterior corners of head; entire scape with pronounced longitudinal striae, (6) eyes small, ranging from 0.15–0.19x HL, and (7) anterior margin of clypeus flat to weakly convex, apron lacking clypeal teeth.

Queens are diagnosed by: (1) ergatoid, with morphology similar to workers except for presence of ocelli and slightly larger size compared to workers, (2) psammophore poorly-developed, consisting of short to medium-length hairs scattered across ventral side of head, (3) first gastral tergum lacking striae, (4) mesosoma weakly to moderately enlarged, mesosomal segments fused, metanotal groove weakly to moderately impressed, (5) head elongate (CI <94.0), and (6) femur long (HFI> 116.0).