Strumigenys robertsoni

The small number of collections of this species suggest it prefers semi-open vegetation, including disturbed areas, and lives in the ground/litter.

Identification
Bolton (2000) - A member of the emarginata complex in the Strumigenys emarginata  group. S. robertsoni most closely resembles the West African Strumigenys exunca but the latter is less sculptured and has numerous standing simple hairs present posteriorly on the cephalic dorsum that contrast strongly with the spoon-shaped ground-pilosity.

Distribution based on Regional Taxon Lists
Afrotropical Region: Kenya, South Africa, Zimbabwe.

Nomenclature

 *  robertsoni. Pyramica robertsoni Bolton, 2000: 305 (w.) ZIMBABWE. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 126

Worker
Holotype. TL 2.3, HL 0.64, HW 0.38, CI 59, ML 0.10, MI 16, SL 0.30, SI 79, PW 0.24, AL 0.61. Characters of emarginata-complex. With head in full-face view ground-pilosity of the dorsum of numerous small spoon-shaped hairs that are very conspicuous; these hairs denser on the clypeal dorsum than elsewhere. Lateral margin of occipital lobe without projecting simple hairs but a number of curved spoon-shaped hairs may break the outline. In profile the spoon-shaped ground-pilosity may be continuous to the occipital margin or the posteriormost transverse row may be somewhat more slender and more elevated, though simple hairs that contrast strongly in shape are not present. Pronotal dorsum with distinct curved spoon-shaped hairs only. Mesonotum with very sparse spoon-shaped ground-pilosity and with 3-4 pairs of long standing hairs that are simple, slightly flattened or weakly remiform, and usually shallowly curved. Pleurae and side of propodeum reticulate to reticulate-punctate everywhere. Pronotal dorsum weakly sculptured.

Type Material
Holotype worker, Zimbabwe: Gwebi, 1971, pitfall trap, acc. 14410 (K. J. Wilson).