In order to examine social behavior in the little-studied ponerine ant genus Gnamptogenys, detailed observations were made on captive colonies of G. horni. Compilation of a behavioral repertory gave evidence of age-based division of labor, with old ants more likely to forage and young ants more likely to tend brood. Workers were observed to line the walls of their nests with pieces of old cocoons, a behavior referred to as wallpapering and previously known from only one other ant species. Evidence was obtained for the use of trail recruitment pheromones in foraging and in nest-moving. Examination of prey remains in natural nests indicated that G. horni feeds principally on a wide variety of ants, but also on other arthropods. (Pratt 1994)
A member of the regularis complex (in the regularis subgroup of the mordax species group). Subtriangular mandibles; dorsum of petiolar node with posteromedian longitudinal costulae, transversely arched anteriorly; episternal costulate curve on to declivitous propodeal face. Body dark brown; legs and antennae ferruginous. (Lattke 1995)
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
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The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- horni. Ectatomma (Gnamptogenys) regulare st. horni Santschi, 1929h: 475, fig. 47 (w.) GUYANA. Combination in Gnamptogenys: Brown, 1958g: 228. Raised to species: Brown, 1958g: 228. See also: Lattke, 1995: 170.
- Brown, W. L., Jr. 1958g. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bull. Mus. Comp. Zool. 118: 173-362 (page 228, Combination in Gnamptogenys, and raised to species)
- Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). J. Hym. Res. 4: 137-193 PDF (page 170, see also)
- Lattke, J.E., Fernández, F. & Palacio, E.E. 2007. Identification of the species of Gnamptogenys Roger in the Americas (pp. 254-270). In Snelling, R.R., Fisher, B.L. & Ward, P.S. (eds). Advances in ant systematics: homage to E.O. Wilson – 50 years of contributions. Memoirs of the American Entomological Institute 80: 690 pp.
- Pratt, S. C. 1994. Ecology and behavior of Gnamptogenys horni (Formicidae, Ponerinae). Insect. Soc. 41:255-262.
- Santschi, F. 1929h. Révision du genre Holcoponera Mayr. Zool. Anz. 82: 437-477 (page 475, fig. 47 worker described)