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|Senior synonym of Odontomachus microcephalus, Odontomachus notata, Odontomachus paucidens, Odontomachus pubescens, Odontomachus rugisquama, Odontomachus sericeus: Brown, 1976a}: 102.|
|See also: Brown, 1976a}: 129.|
Costa Rica south throughout tropical South America, Galapagos, West Indies (except Cuba and Bahamas). Distribution in Costa Rica: common in lowlands throughout.
This species appears to be more tolerant of dry conditions than many other Odontomachus species. Throughout its range it often extends further than other neotropical species into seasonally dry or semiarid habitats (Brown 1976).
Nests of O. bauri that I have observed in Costa Rica have almost all been under epiphytes in the canopy (I once observed an aggregation of workers in a rotten log on the forest floor, but there was no brood). On the Pacific side of Costa Rica bauri is a very common forager on the ground, and appears to be the most common Odontomachus species in most habitats. On the Atlantic side, nests are common in the canopy, but workers are rarely seen at ground level. Thus, to the typical ground-based ant collector, bauri appears to be very rare on the Atlantic side. At the time of Brown's (1976) revision, he knew of only a single specimen from the Atlantic lowlands, an alate queen collected near Guapiles. I think this is a collector bias, because the species is quite common in the canopy. Brown's Guapiles queen was the northernmost record of the species in Central America at the time of his revision. I expect that the true range of the species extends farther northward in Atlantic lowland rainforest.
Bolton, B. 1995. A New General Catalogue of the Ants of the World. Harvard University Press, Cambridge, Mass.
Brown, W. L., Jr. 1976. Contributions toward a reclassification of the Formicidae. Part VI. Ponerinae, tribe Ponerini, subtribe Odontomachiti. Section A. Introduction, subtribal characters. Genus Odontomachus. Studia Entomol. 19:67-171.
Emery, C. 1890. Studii sulle formiche della fauna neotropica. I-V. Boll. Soc. Entomol. It. 22:38-80.
Emery, C. 1892(1891). Voyage de M. Ch. Alluaud dans le territoire d'Assinie. Formicides. Annls Soc. Entomol. Fr. 60:553-574.
Fabricius, J. C. 1793. Entomologia Systematica. Hafniae: Proft. vol. 2, 519 pp. Ants - p. 349-365.
Forel, A. 1908. Fourmis de Costa-Rica recoltees par M. Paul Biolley. Bull. Soc. Vaud. Sci. Nat. 44:35-72.
Roger, J. 1861. Die Ponera-artigen Ameisen (Schluss). Berl. Entomol. Z. 5:1-54.
Found most commonly in these habitats: 33 times found in 2º lowland rainforest, 19 times found in forest, 8 times found in wet cloud forest, 11 times found in tropical rainforest, 5 times found in wet trop. forest, 5 times found in wet forest, 3 times found in SSO 350m, 4 times found in mature wet forest, 4 times found in montane forest, 1 times found in CCL 400, ...
Collected most commonly using these methods or in the following microhabitats: 46 times Winkler, 34 times Baiting, 29 times Search, 11 times Fogging, 13 times miniWinkler, 5 times MaxiWinkler, 2 times Colecta manual, 2 times hand collecting, 2 times Malaise, 1 times Aspirador, 1 times lights, ...
Elevations: collected from 5 - 1200 meters, 261 meters average