Pheidole obscurithorax Naves, 1985

Minor worker measurements (n=1): HW 0.71, HL 0.82, SL 1.10, EL 0.20, WL 1.12, PSL 0.02, PTW 0.14, PPW 0.20, CI 86, SI 156, PSLI 2, PPI 143.

Soldier measurements (n=3): HW 1.63–1.73, HL 1.69–1.78, SL 0.98–1.10, EL 0.24–0.27, WL 1.47–1.65, PSL 0.06–0.10, PTW 0.25–0.29, PPW 0.35–0.47, CI 95–98, SI 61–67, PSLI 3–6, PPI 138–160.

Material examined. Colombia: 1 soldier, Meta, San Martin, Reserva Natural el Caduceo, km 4.5 vía San Francisco, 3.6655, -73.6583, alt. 309m, 10-14. Mar. 2014. Coll. T. Velasco, pitfall [MPUJ]; 1 minor worker, same data except by Coll. L. Rodríguez [MPUJ]; 1 soldier, Puerto Gaitán, Altamira, Club los Llaneros, alt. 140m, 22. Oct. 2006. Coll. K. Avellaneda, D. Rincón & D. Rodríguez, pitfall [MPUJ] ; 1 soldier, Puerto López, La Libertad, alt. 366m, Oct. 2006 Coll. J. Arce [MPUJ] .

Comments. This is a new record for Colombia, although previously known in several other South American countries including French Guiana, Ecuador, Peru, Bolivia, Brazil, Paraguay, Uruguay, Argentina. The species is exotic in the USA (Wilson 2003). Pheidole obscurithorax soldiers from Colombia are identical to the holotype from Argentina.