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The type locality of humilis is Panama (Barro Colorado Island). I have seen humilis-like material from Venezuela, Trinidad, Panama, and Costa Rica. In Costa Rica I have seen specimens only from the Osa Peninsula region, in spite of extensive collecting elsewhere.
Discothyrea are extremely small, cryptobiotic inhabitatants of forest leaf litter (see Genus Overview). In Costa Rica, I have collected workers of this species from three different Winkler samples from three different sites on and near the Osa Peninsula: Sirena, Rancho Quemado, and a site 19km S of Ciudad Neilly.
Weber, N. A. 1939. New ants of rare genera and a new genus of Ponerine ants. Ann. Entomol. Soc. Am. 32:91-104.
Found most commonly in these habitats: 12 times found in 2º mesophil forest, 3 times found in rainforest, 1 times found in wet forest, 1 times found in 2nd growth veg., stream edge, 1 times found in montane rainforest, 1 times found in montane wet forest, 1 times found in college grounds, 1 times found in Pisonia-Tabebuia, 1 times found in El Platanal, Bosque Nublado, 1 times found in hardwood forest litter, ...
Found most commonly in these microhabitats: 24 times ex sifted leaf litter, 2 times Wet forest. Ex sifted leaf litter., 1 times Ex horjarasca, 1 times under leaves, 1 times sifted litter (leaf mold, rotten wood), 1 times forest litter, 1 times ex soil.
Collected most commonly using these methods: 15 times MiniWinkler, 6 times Winkler, 4 times Berlese, 1 times Berlese/Winkler, 1 times hand collection, 1 times MaxiWinkler.
Elevations: collected from 10 - 2000 meters, 1085 meters average