Strumigenys extirpa Bolton 2000

Dacetini, Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

Additional images: worker dorsal view.


Costa Rica (type locality), Panama. In Costa Rica: Atlantic and Pacific lowlands.


Apical fork of mandible with two intercalary teeth; mandible with two pronounced preapical teeth; eye large, with over 35 facets; dorsal and ventral teeth of propodeal lamella pronounced, acute; gaster smooth with basal costulae; gaster covered with closely appressed, spatulate setae. Also see Bolton (2000:564).

Head length 0.80mm, mandible length 0.47, CI 74, MI 59 (holotype worker, from Bolton 2000).

Similar species: fairchildi.

Natural History

Brown and Wilson (1959) summarize the genus as follows:

"Widespread in tropics and warm temperate areas. Primarily forest-dwelling; some species occur in grassland and arid scrub. ... Nests mostly in soil and rotting wood; a few species live in arboreal plant cavities in tropical rain forest. Foraging hypogaeic to epigaeic-arboreal. Food: most species are collembolan feeders; a few are polyphagous predators or occasionally feed on sugary substances..."

Members of the genus are all predaceous, with a kinetic mode of attack (Bolton 1999).

The species is arboreal.

Selected Records

La Selva: single worker from canopy fogging sample.

Carara: dense second growth vegetation at edge of tall wet forest. Lone queen in dead stick of treefall.

Bolton (2000) reports a specimen from Barro Colorado Island, Panama, collected by H. Wolda.

Literature Cited

Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 33:1639-1689.

Bolton, B. 2000. The ant tribe Dacetini, with a revision of the Strumigenys species of the Malagasy Region by Brian L. Fisher, and a revision of the Austral epopostrumiform genera by Steven O. Shattuck. Memoirs of the American Entomological Institute 65:1-1028.

Brown, W. L., Jr. 1962. The neotropical species of the ant genus Strumigenys Fr. Smith: Synopsis and keys to the species. Psyche 69:238-267.

Brown, W. L., Jr., Wilson, E. O. 1959. The evolution of the dacetine ants. Quarterly Review of Biology 34:278-294.

Page author:

John T. Longino, The Evergreen State College, Olympia WA 98505

Date of this version: 7 May 2001
Previous versions of this page: 22 April 1997, 24 July 1997.
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