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Costa Rica, Ecuador. Costa Rica: Atlantic slope to 1000m.
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.
Emery, C. 1894. Studi sulle formiche della fauna neotropica. VI-XVI. Bolletino della Societa Entomologica Italiana 26:137-243.
Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). Journal of Hymenoptera Research 4:137-193.
Found most commonly in these habitats: 2 times found in wet forest, 1 times found in cloud forest, 2 times found in montane wet forest, 1 times found in 2º lowland rainforest, 1 times found in mature wet forest, 1 times found in mt-base forest, 1 times found in Pasture edge/primary forest, 1 times found in ridgetop cloud forest, isolated peak with oak trees, 1 times found in Vargas finca.
Found most commonly in these microhabitats: 2 times nocturnal foragers, 2 times Malaise trap, 1 times Wet forest. Night collecting. Strays on trail surface. Large Gnamptogenys low on, 1 times wet forest at night, 1 times nocturnal strays, 1 times Hojarasca.
Collected most commonly using these methods: 6 times search, 3 times Malaise, 1 times flight intercept trap, 1 times Mini Winkler.
Elevations: collected from 30 - 1060 meters, 610 meters average
Type specimens: syntype of Gnamptogenys alfaroi: casent0903845