Strumigenys deletrix Bolton 2000

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

worker lateral view

worker face view


Costa Rica: southern Pacific lowlands (19km south Ciudad Neily).


Apical fork of mandible with a single intercalary tooth; mandible with two conspicuous preapical teeth; mandible extremely long, longer than head; gaster smooth and shiny; specialized humeral hair short, broadly spatulate, curved posteriorly and closely applied to the surface; dorsolateral margin of the head close to the apex of the scrobe without stiff projecting hair. Also see Bolton (2000:533).

Head length 0.77mm, mandible length 0.82, CI 77, MI 106 (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).

This species is known only from the types.

Selected Records

Winkler sample 19km S Ciudad Neily.

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. 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: 21 August 1997
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