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Costa Rica to hylean South America. Costa Rica: southwestern lowlands.
Anochetus are presumably predators, using their snapping mandibles much like their larger relatives, Odontomachus. However, there are few direct observations.
A. diegensis is known from one collection in Costa Rica: Puntarenas: 19km S Ciudad Neily, 8¡29'N, 82¡58'W, 20m (J. Longino). Patch of lowland primary rain forest with trees being felled. Ex sifted leaf litter from forest floor.
Brown, W. L., Jr. 1978. Contributions toward a reclassification of the Formicidae. Part VI. Ponerinae, tribe Ponerini, subtribe Odontomachiti. Section B. Genus Anochetus and bibliography. Studia Entomol. 20:549-652.
Forel, A. 1912. Formicides neotropiques. Part I. Ann. Soc. Entomol. Belg. 56:28-49.
Found most commonly in these habitats: 0 times found in Rainforest, 1 times found in 2nd growth veg., stream edge, 1 times found in dry forest, 1 times found in lowland wet forest, 1 times found in riparian dry forest, 1 times found in wet forest, 1 times found in Fila El Viento, Bosque Seco, 1 times found in lowland rainforest, 1 times found in Narrow strip of riparian forest, surrounded by steep pastures, 1 times found in tropical dry forests.
Found most commonly in these microhabitats: 5 times ex sifted leaf litter, 0 times Ground strays, 1 times Ticoporo Forest Reserve. Dense second growth with few larger trees. Ex sifted le, 1 times ex sifted litter, 1 times Ex hojarasca, 0 times Berlesate, leaf mould, 1 times sifted litter (leaf mold, rotten wood).
Collected most commonly using these methods: 7 times Winkler, 0 times Baited pitfall, 1 times Davis litter sifting.
Elevations: collected from 20 - 1050 meters, 312 meters average