Gnamptogenys horni

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Gnamptogenys horni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. horni
Binomial name
Gnamptogenys horni
(Santschi, 1929)

Gnamptogenys horni casent0178678 profile 1.jpg

Gnamptogenys horni casent0178678 dorsal 1.jpg

Specimen labels

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

Neotropical Region: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana (type locality), Panama, Peru, Suriname, Trinidad and Tobago, Venezuela.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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.