Pheidole sensitiva Borgmeier 1959

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

major face view

major lateral view


Minor worker: head length 0.64mm, head width 0.59mm, scape length 0.77mm, Webers length 0.77mm (n=1). Head without vertex collar; promesonotal and metanotal grooves well impressed; propodeal spines short; face, pronotum, and gaster completely smooth and shiny; sides of mesonotum and propodeum foveolate; face, pronotum, and gaster covered with abundant, very long, whitish, flexuous setae; color dark brown.

Major worker: head length 0.97mm, head width 0.92mm, scape length 0.66mm (n=1); face with rugae anterior to eyes, rest of face completely smooth and shiny; hypostomal margin flat with pair of widely-spaced teeth, each tooth sharp and needle-like, located near small recessed tooth flanking mandible; face and pronotum with long, flexuous setae, like worker; gaster with dense brush of long, flexuous setae.


Brazil (RJ; type locality), Colombia, Costa Rica. Costa Rica: Atlantic and southern Pacific slopes to 700m.

Natural History

This species occurs in mature wet forest. It recruits to baits on the forest floor.

Selected Records

La Selva: Berlese sample and forest floor baits.

Guanacaste Conservation Area (Pitilla): Winkler sample.

Corcovado National Park (cloud forest above Rio Nino, 700m elevation): at baits.


MCZC material from Colombia and Costa Rica is identified as sensitiva by E. O. Wilson.

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: 8 December 1997
Previous versions of this page:
Go back to top

Go to Ants of Costa Rica Homepage