Strumigenys idiogenes Bolton 2000

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

worker lateral view

worker face view


Costa Rica (known from one specimen from agricultural area near Guapiles).


Apical fork of mandible with one intercalary tooth; right mandible with one acute preapical tooth near apical fork, left mandible without preapical tooth; propodeal spines long, well developed; first gastral tergum mat, finely and densely striatopunctate on anterior third, remainder finely and densely punctate; first gastral tergum with abundant long, stiff, clavate setae, separated by a distance subequal to their length. See also Bolton (2000:527).

HL 0.78mm, ML 0.53, CI 85, MI 67 (n=1).

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).

I know this species from one specimen (the holotype), a worker collected by Bob Matlock, in an intercept trap in an agricultural area near Guapiles.

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., Wilson, E. O. 1959. The evolution of the dacetine ants. Quart. Rev. Biol. 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: 31 March 1999
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