Pogonomyrmex bispinosus

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 : 61

Pogonomyrmex bispinosus -group

Workers in the P. bispinosus -group are diagnosed by the following characters: (1) psammophore well-developed, (2) first gastral tergum lacking striae, (3) posterior surface of petiolar node with transverse rugae or rugoreticulate, and (4) dorsum of postpetiole lacking rugae. Queens have: (1) psammophore well-developed, (2) weak transverse, but usually incomplete rugae on dorsum of postpetiole, and (3) short, delicate hairs along the lateral margin of propodeal declivity.