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Guyana (type locality), Panama, Costa Rica.
Discothyrea are extremely small, cryptobiotic inhabitatants of forest leaf litter (see Genus Overview).
In Costa Rica, this species occurs in lowland forests throughout the country. It is common at La Selva Biological Station, and I have collected it at sites in both the wet southern Pacific lowlands and the seasonally dry northern Pacific lowlands. Collections are usually workers with or without dealate queens in Winkler or Berlese samples from the forest floor. At La Selva Biological Station alate queens were relatively common in canopy fogging samples.
I have a collection from Wilson Botanical Gardens tentatively identified as denticulata, but it is larger and is somewhat intermediate in morphology between denticulata and the southern form of JTL-009. At La Selva, D. denticulata and D. horni clearly separate into two morphological clusters, but in some Pacific slope sites I have had difficulty clearly separating them.
Weber, N. A. 1939. New ants of rare genera and a new genus of Ponerine ants. Ann. Entomol. Soc. Am. 32:91-104.
Weber, N. A. 1940. Rare Ponerine genera in Panama and British Guiana (Hym.: Formicidae). Psyche 47:75-84.
Found most commonly in these habitats: 2 times found in cloud forest litter, 1 times found in Plateau, 1 times found in evergreen forest litter, 1 times found in La Esperanza, Bosque Semi decíduo, 1 times found in mature wet forest.
Found most commonly in these microhabitats: 4 times ex sifted leaf litter, 1 times Leaf litter, 1 times Ex hojarasca.
Collected most commonly using these methods: 4 times Winkler, 1 times Pitfall72h.
Elevations: collected from 35 - 1689 meters, 891 meters average