Gnamptogenys strigata

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Gnamptogenys strigata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. strigata
Binomial name
Gnamptogenys strigata
(Norton, 1868)

Gnamptogenys strigata P casent0281230.jpg

Gnamptogenys strigata D casent0281230.jpg

Specimen Label


A dweller of wet montane transandean forests, commonly taken in leaf litter samples.


A member of the strigata complex (in the strigata subgroup of the striatula species group). Roughly costate; anterior postpetiolar surface fairly flat and with 3-4 transverse costae; abundant long, subdecumbent and suberect hairs on body. Aside from aspects covered by Kempf & Brown (1968), other characters that vary are the size of the propodeal spiracle, costulation of the propodeal declivity and the shape of the node. (Lattke 1995)

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Belize, Colombia, Costa Rica, French Guiana, Guatemala, Guyana, Honduras, Mexico (type locality), Panama, Suriname.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


Longino, Ants of Costa Rica - This is the most common Gnamptogenys species above 500m elevation in wet forest leaf litter. It occurs at lower elevations (e.g. La Selva) but is less common there. It is frequently encountered foraging on the ground at night, and is common in samples of sifted leaf litter (Winkler samples). It nests in and under dead wood on the ground, under stones, and in soil. It may be polygynous: I observed a nest in Monteverde with two dealate queens. Observations of prey items include lepidopteran larvae, isopods, diptera (adults and larvae), and beetle larvae.

Nest observation from Guanacaste Province, Cerro Cacao: I discovered a nest in the soil of a steep bank at the side of a trail. Many workers were out foraging, and several workers were observed dragging a dead Camponotus albicoxis to the nest. I excavated the nest; it extended no more than 10cm horizontally back into the bank. There were several irregular galleries and chambers. One major chamber contained the queen.



The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • strigata. Polyrhachis strigata Norton, 1868c: 4 (w.) MEXICO. Wheeler, G.C. & Wheeler, J. 1964b: 450 (l.). Combination in Ectatomma (Holcoponera): Emery, 1892b: 167; in Holcoponera: Emery, 1911d: 41; in Gnamptogenys: Brown, 1958g: 229. Senior synonym of concentrica: Dalla Torre, 1893: 26; Emery, 1896g: 44 (in key); of simplex (and its junior synonyms foreli, satzgeri, spurium): Kempf & Brown, 1968: 90. See also: Lattke, 1995: 187.
  • satzgeri. Ectatomma (Holcoponera) satzgeri Forel, 1908b: 39 (w.q.) COSTA RICA. Combination in Holcoponera: Emery, 1911d: 40. Subspecies of simplex: Santschi, 1929h: 461. Junior synonym of simplex: Brown, 1956b: 490.
  • simplex. Ectatomma (Holcoponera) simplex Emery, 1896g: 46, pl. 1, fig. 7 (w.q.) COSTA RICA. Combination in Holcoponera: Emery, 1911d: 40; in Gnamptogenys: Brown, 1958g: 229. Senior synonym of foreli, satzgeri, spurium: Brown, 1956b: 490. Junior synonym of strigata: Kempf & Brown, 1968: 90.
  • spurium. Ectatomma (Holcoponera) simplex subsp. spurium Forel, 1908b: 39 (w.) GUATEMALA. Combination in Holcoponera: Emery, 1911d: 40. Junior synonym of simplex: Brown, 1956b: 490.
  • concentrica. Gnamptogenys concentrica Mayr, 1870b: 964 (w.) MEXICO. Combination in Ectatomma (Holcoponera): Mayr, 1887: 540. Junior synonym of strigata: Dalla Torre, 1893: 26; Emery, 1896g: 44 (in key).
  • foreli. Holcoponera simplex st. foreli Santschi, 1929h: 460, fig. 34 (w.m.) COSTA RICA. Junior synonym of simplex: Brown, 1956b: 490.



  • Brown, W. L., Jr. 1958g. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bull. Mus. Comp. Zool. 118: 173-362 (page 229, Combination in Gnamptogenys)
  • Dalla Torre, K. W. von. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. (page 26, Senior synonym of concentrica)
  • Emery, C. 1892c [1891]. Note sinonimiche sulle formiche. Bull. Soc. Entomol. Ital. 23: 159-167 (page 167, Combination in Ectatomma (Holcoponera))
  • Emery, C. 1896g. Studi sulle formiche della fauna neotropica. XVII-XXV. Bull. Soc. Entomol. Ital. 28: 33-107 (page 44, (in key) Senior synonym of concentrica)
  • Emery, C. 1911e. Hymenoptera. Fam. Formicidae. Subfam. Ponerinae. Genera Insectorum 118: 1-125 (page 41, Combination in Holcoponera)
  • Kempf, W. W.; Brown, W. L., Jr. 1968. Report on some Neotropical ant studies. Pap. Avulsos Zool. (Sao Paulo) 22: 89-102 (page 90, Senior synonym of simplex ( and its junior synonyms foreli, satzgeri and spurium))
  • Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). J. Hym. Res. 4: 137-193 (page 187, 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. PDF
  • E. Lommelen, C.A. Johnson, F.P. Drijfhout, J. Billen, B. Gobin. 2008. Egg marking in the facultatively queenless ant Gnamptogenys striatula: The source and mechanism. Journal of Insect Physiology 54, 727–736 (doi:10.1016/j.jinsphys.2008.02.002)
  • E. Lommelen & C.A. Johnson & F.P. Drijfhout & J. Billen & T. Wenseleers & B. Gobin. 2006. Cuticular Hydrocarbons Provide Reliable Cues of Fertility in the Ant Gnamptogenys striatula. J Chem Ecol 32, 2023–2034 (DOI 10.1007/s10886-006-9126-8)
  • Norton, E. 1868c. Description of Mexican ants noticed in the American Naturalist, April, 1868. Proc. Essex Inst. (Commun.) 6: 1-10 (page 4, worker described)
  • Wheeler, G. C.; Wheeler, J. 1964b. The ant larvae of the subfamily Ponerinae: supplement. Ann. Entomol. Soc. Am. 57: 443-462 (page 450, larva described)