Pheidole ectatommoides Wilson 2003

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

major face view

major lateral view


Minor worker: head length 0.85mm, head width 0.78mm, scape length 0.89mm, Webers length 1.13mm (n=1). Entire head and mesosoma regularly costate, much like the sculpture of many Gnamptogenys species; mesonotal suture moderately impressed, metanotal groove deeply impressed; propodeal spines of moderate length, upturned; gastral dorsum smooth and shiny; dorsal pilosity abundant, long, flexuous; color red.

Major worker: head length 2.33mm, head width 2.22mm, scape length 0.97mm (n=1). Face densely vermiculate rugose foveolate throughout; hypostomal margin flat, in the form of a broad shelf perpendicular to the underside of head, with no medial teeth, only small teeth flanking inner mandible bases; dorsal pilosity abundant; head with abundant short erect setae projecting from sides in face view.


Colombia, Costa Rica, Ecuador, Panama. Costa Rica: Atlantic slope.

Natural History

Occurs in mature wet forest; forages nocturnally.

Selected Records

Penas Blancas Valley: mature wet forest at night; minors and majors scattered on a branch on the ground in an old branchfall. No nest was found. Workers were showing great interest in small cocoon-like objects stuck to the underside of the branch. The workers were clustering around them as if they were brood.

Penas Blancas Valley: nocturnal foragers on ground.

La Selva.

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: 2 September 2003.
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