Pyramica depressiceps (Weber 1934)

Dacetini, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view


Full Range: Costa Rica, Panama, Colombia, Guyana, Ecuador, Peru.

Costa Rican Range: Atlantic lowlands.


Mandibles in side view straight, not broadly curved ventrally; mandibles relatively short, subtriangular, much of the apical portion meeting along a serially toothed masticatory margin when closed (former Smithistruma); color red-brown; face punctate; sides of posterior half of mesosoma completely and densely punctulate; face and mesosoma with abundant, stiff, short setae (stubble); leading edge of scape with a row of conspicuous projecting curved hairs, of which those distal to the subbasal bend distinctly curve toward the base of the scape; pronotal humeral hair absent; head in profile strongly dorsoventrally flattened; dorsal surfaces of middle and hind tibiae with abundant freely projecting suberect to erect simple hairs. Also see Bolton (2000:218).

Natural History

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

This species occurs in wet forest habitats. It inhabits leaf litter on the forest floor. I have only seen it from Winkler samples, and one nocturnal forager.

Original Description

Strumigenys (Cephaloxys) depressiceps Weber 1934:47, figs. 6, 14. Syntype worker, male: Guyana, Kartabo, 19.vii.1920 (W. M. Wheeler) [MCZ, USNM, LACM].

Later moved to Smithistruma, then Pyramica. See Bolton (2000) for complete synonymy.

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.

Weber, N. A. 1934. Notes on neotropical ants, including the descriptions of new forms. Rev. Entomol. (Rio J.) 4:22-59.

Page author:

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

Date of this version: 7 May 2001
Previous versions of this page: 4 March 1997
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