Dacetini, Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
Additional images: worker, dorsal view (small, large).
line drawing of worker face (from Brown 1962)
Southern Mexico to Colombia and Venezuela, Bahamas (where probably introduced; Brown 1961), Cuba. Costa Rica: Atlantic and southern Pacific lowlands.
Apical fork of mandible with single intercalary tooth; mandible with single conspicuous preapical tooth near apical fork; eye composed of approximately 20 facets; basal fourth to all of first gastral tergum finely longitudinally striolate, opaque-sericeous, noncostulate portion of tergum (if any) smooth and shining; gaster covered with dense brush of flagelliform setae. See also Bolton (2000:521).
Head length 0.55-0.60mm, mandible length 0.35-0.38, CI 77-80, MI 60-64 (n=6 workers from 3 localities; Brown 1961 and one La Selva specimen).
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).
lanuginosa occurs in wet and dry forest habitats. It nests in dead wood on the ground.
Winkler samples from Finca La Pacifica, 19km S Ciudad Neily.
La Selva: nocturnal forager in wet forest.
La Selva: nest in dead wood on ground (Thompson study).
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. 1961. The Neotropical species of the ant genus Strumigenys Fr. Smith: Miscellaneous concluding studies. Psyche 68:58-69.
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.
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.email@example.com
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