Pogonomyrmex mayri

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 : 98

Pogonomyrmex mayri -group

Pogonomyrmex mayri is a monotypic species-group in which all three castes are easily diagnosed. Workers are diagnosed by: (1) striae on first gastral tergum, (2) psammophore poorly-developed, consisting of numerous short hairs scattered across ventral side of head, (3) deeply incised sculpturing on head and mesosoma, (4) antennal scapes densely granulate-punctate with strongly flattened base, (5) superior and inferior propodeal spines long, acuminate, (6) posterior surface of petiolar node flattened, and (7) anterior margin of clypeus concave with a small medial tooth ( Figure 49). Queens are diagnosed by: (1) ergatoid, with ocelli not visible or absent, (2) striae on first gastral tergum, (3) postpetiole enlarged (PPW> 1.20 mm), wider than long, (4) anterior clypeal margin with medial tooth, and (5) anterior surface of petiolar node striate ( Figure 50).