Pheidole excubitor Wilson 2003

= Pheidole JTL-118

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

major face view

major lateral view


Minor worker: head length 0.77mm, head width 0.72mm, scape length 0.77mm, Webers length 1.04mm (n=1). Head broadly rounded behind; scapes foveolate, with appressed setae; promesonotum evenly arched, mesonotal suture very weakly impressed or absent; humeri developed, forming distinct bosses; propodeal spines short, sharp, upturned; posterior slope of metanotal groove and anterior dorsum of propodeum forming step-like prominence; face generally shiny with very faint, superficial punctation, punctation stronger and with some rugae between eyes and frontal carinae; mesosoma superficially foveolate throughout; gaster smooth and shining; dorsal pilosity sparse, short, stiff, approximately 4 pairs on promesonotum, none on propodeal dorsum; color orange brown.

Major worker: measurements similar to exarata. Face punctatorugose on anterior two thirds, rugae largely longitudinal, subparallel, especially between frontal carinae, gradually fading to smooth and shining on vertex lobes; clypeus with weak, dispersed longitudinal rugae; hypostomal margin with very low, rounded medial lobe, pair of subtriangular teeth located about one third distance from midline to recessed teeth flanking mandibles; dorsal pilosity sparse, short, stiff, approximately three pairs on promesonotum, none on propodeal dorsum; other than one pair on vertex lobes, no setae projecting from sides of head in face view.


Costa Rica: Atlantic lowlands.

Natural History

Occurs in lowland rainforest; arboreal; nests beneath epiphytes.

Selected Records

La Selva: in recent (less than one week old) treefall.

La Selva: Carapa guianensis, felled previous day, tree was somewhat isolated in low second growth veg.; abundant vines in treefall, mainly Marcgraviaceae; populous nest under epiphyte mat.


See Comments under exarata.

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.
Previous versions of this page: 27 December 1997
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