Pheidole spathipilosa Wilson 2003

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

major face view

major lateral view


Minor worker: head length 0.66mm, head width 0.52mm, scape length 0.88mm, Webers length 0.87mm (n=1). Head without vertex collar; promesonotal and metanotal grooves well impressed; face superficially foveolate with irregularly shaped medial shiny patch; mesosoma foveolate throughout; gastral dorsum weakly shagreened anteriorly, fading to smooth and shiny posteriorly; pilosity bristly, with erect setae short, stiff, dark brown, some of them flattened and expanded at the tip; head and gaster dark brown to black, mesosoma lighter red-brown.

Major worker: head length 0.92mm, head width 0.84mm, scape length 0.81mm (n=1); face rugose foveolate, the punctation somewhat patchy, interspersed with smooth shiny patches, especially medially; surface of face somewhat lumpy, not evenly convex; hypostomal margin flat with pair of widely-spaced teeth, each tooth sharp and needle-like, located in front of small recessed tooth flanking mandible (Figure); pilosity bristly like minor worker, including abundant erect setae on sides of head.

A collection from the San Vito area of Costa Rica has a shinier face on minor worker and major worker (Figure).


Costa Rica (Atlantic slope).

Natural History

Occurs in wet forest habitats; rare.

Selected Records

La Selva: at baits on forest floor.

Page authors:

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

Stefan Cover, Museum of Comparative Zoology, Harvard University, Cambridge MA 02138 USA.

Date of this version: 7 October 2003.
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