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.
diegensis. Anochetus diegensis Forel, 1912c: 29 (w.) COLOMBIA. Senior synonym of bierigi: Brown, 1964d: 215. See also: Brown, 1978c: 614.
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.