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Guatemala (type locality), Costa Rica. Costa Rica: throughout the country in wet to moist habitats.
This tiny species, the smallest known to me, occurs in a wide variety of habitats throughout Costa Rica. It is common in the lowland rainforest of La Selva and in the cloud forest of Monteverde. Although common in mature forested habitats, it is not restricted to them; I have collected it in Parque Nacional, a small city park in the middle of San Jose! Workers were in some dead wood at the base of a tree, at the edge of a city sidewalk. The species occurs very often in Winkler samples of leaf litter from the forest floor. I rarely collect it by any other means. I once found a nest under loose bark of dead wood, and I once observed workers emerging from under loose bark to recruit to a dead tabanid.
I have seen an ergatoid male of what I assume to be this species, from La Selva Biological Station. It was an isolated specimen from a soil sample, not associated with workers. I associate it with this species due to its small size.
Forel, A. 1909. Ameisen aus Guatemala usw., Paraguay und Argentinien (Hym.). Dtsch. Entomol. Z. 1909:239-269.
Found most commonly in these habitats: 204 times found in mature wet forest, 141 times found in montane wet forest, 114 times found in cloud forest, 52 times found in tropical wet forest, 49 times found in tropical rainforest, 40 times found in ridgetop cloud forest, 40 times found in ridgetop cloud forest, isolated peak with oak trees, 39 times found in riparian forest, cloud forest along stream, near dairy farm pasture, 2nd growth or disturbed primary, 34 times found in lowland rainforest, 30 times found in tropical moist forest, ...
Found most commonly in these microhabitats: 880 times ex sifted leaf litter, 55 times Hojarasca, 11 times sifted litter, 3 times leaf litter, 4 times Wet forest. Ex sifted leaf litter., 5 times at bait, 4 times ex sifted litter, 4 times ex sifted leaf litter on ground, 3 times sifted litter (leaf mold, rotten wood), 2 times sifted leaf litter, 2 times Entre trampa M/01 y M/02, ...
Collected most commonly using these methods: 700 times MiniWinkler, 127 times MaxiWinkler, 85 times Winkler, 60 times Berlese, 62 times Mini Winkler, 7 times search, 5 times baiting, 1 times Malaise, 1 times Night MiniWinkler.
Elevations: collected from 10 - 2010 meters, 756 meters average
Type specimens: syntype: jtl021918