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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 tropical dry forests
Collected most commonly using these methods or in the following microhabitats: 7 times Winkler
Elevations: collected from 20 - 1050 meters, 302 meters average