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Species: Gnamptogenys strigata   (Norton, 1868) 

Classification:
Download Data

Taxonomic History (provided by Barry Bolton, 2017)

Polyrhachis strigata Norton, 1868c PDF: 4 (w.) MEXICO. AntCat AntWiki HOL

Taxonomic history

Combination in Ectatomma (Holcoponera): Emery, 1892c PDF: 167; in Holcoponera: Emery, 1911e PDF: 41; in Gnamptogenys: Brown, 1958g PDF: 229.
Senior synonym of Gnamptogenys concentrica: Dalla Torre, 1893 PDF: 26; Emery, 1896g PDF: 44 (in key); of Gnamptogenys simplex (and its junior synonyms Gnamptogenys foreli, Gnamptogenys satzgeri, Gnamptogenys spurium): Kempf & Brown, 1968 PDF: 90.
See also: Lattke, 1995 PDF: 187.

Distribution:


Neotropical Region: Alajuela, Alta Verapaz, Atlántida, Baja Verapaz, Belize, Cartago, Cayo, Chiapas, Chontales, Colombia, Comayagua, Costa Rica, Ecuador, Francisco Morazán, French Guiana, Guanacaste, Guatemala, Guyana, Heredia, Honduras, Huehuetenango, Jinotega, Lempira, Limón, Madriz, Matagalpa, Nicaragua, Nueva Segovia, Oaxaca, Olancho, Panama, Petén, Puntarenas, Quiche, Suriname, Valle de Cauca, Zacapa

Distribution Notes:

Mexico to Colombia (Brown 1958, Lattke 1995). Costa Rica: widespread in wet forest between 500 and 2000m elevation, rare at lower elevations. Occurs from Cordillera de Guanacaste to Talamancas.

Biology:

Natural History:

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 albicoxus 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.

References:

Brown, W. L., Jr. 1958. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bulletin of the Museum of Comparative Zoology 118:175-362.

Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). Journal of Hymenoptera Research 4:137-193.

Norton, E. 1868. Description of Mexican ants noticed in the American Naturalist, April 1868. Communications of the Essex Institute 6:1-10.

Specimen Habitat Summary

Found most commonly in these habitats: 395 times found in montane wet forest, 213 times found in cloud forest, 178 times found in mesophyll forest, 123 times found in mature wet forest, 60 times found in mesophil forest, 50 times found in lowland wet forest, 45 times found in wet forest, 39 times found in cloud forest, primary, near ridgetop, 38 times found in cloud forest, primary, along steep ridge near peak, 34 times found in CES (700.350 GIS), ...

Found most commonly in these microhabitats: 743 times ex sifted leaf litter, 293 times at bait, 138 times Hojarasca, 36 times ex sifted litter from forest floor, 1 times found in fruit, 16 times forest litter, 26 times pan trap, 20 times Hojarasca, en bosque paralelo al sendero gradiente fuerte y al lado de paredon, 13 times Hojarasca, mature forest, dropping, 11 times Hojarasca, bosque, 1 times nest in dead wood, ...

Collected most commonly using these methods: 584 times MiniWinkler, 295 times Baiting, 212 times Mini Winkler, 115 times Winkler, 52 times search, 97 times MaxiWinkler, 30 times Berlese, 34 times Search & Berles, 35 times Pan Trap, 13 times Malaise, 13 times flight intercept trap, ...

Elevations: collected from 50 - 1930 meters, 1109 meters average

Type specimens: syntype of Ectatomma simplex spurium: casent0907173; syntype of Ectatomma satzgeri: casent0907172; syntype of Ectatomma simplex: casent0903838; syntype of Holcoponera simplex foreli: casent0915126



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