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Peru (type loc.), Costa Rica. Costa Rica: Atlantic and Pacific slopes.
This is an extremely tiny ant. I know the species from two collections:
Costa Rica, Prov. Puntarenas, Osa Peninsula, Ranch Quemado: ex sifted leaf litter from wet forest floor (Winkler sample).
Costa Rica, Prov. Heredia, 17km N Vol. Barba, 800m (Barva Transect): ex sifted leaf litter from wet forest floor (Winkler sample).
Fern‡ndez described this species from one collection from Peru. This species matches the description and keys to C. inca, although it is difficult to distinguish his C. inca and C. paya (a related species from Colombia).
Fern‡ndez C., F. 2004. The American species of the myrmicine ant genus Carebara Westwood (Hymenoptera: Formicidae). Caldasia 26:191-238.
Found most commonly in these habitats: 43 times found in tropical wet forest, 33 times found in mature wet forest, 7 times found in montane wet forest, 4 times found in tropical rainforest, 4 times found in 2º lowland rainforest, 4 times found in wet forest, 1 times found in cloud forest, 1 times found in montane wet forest, along ridge leading to stream, oak trees present, probably mature or old 2nd growth with relict trees, near pasture, 1 times found in 2nd growth forest, 1 times found in forest, ...
Found most commonly in these microhabitats: 95 times ex sifted leaf litter, 1 times Wet forest. Ex sifted leaf litter., 2 times litter sample, 1 times Cerca de; Cañon del rio Peje hacia Cascante, 1 times at bait.
Collected most commonly using these methods: 76 times miniWinkler, 15 times MaxiWinkler, 5 times Winkler, 1 times baiting, 1 times Berlese, 1 times litter sample.
Elevations: collected from 30 - 1090 meters, 562 meters average