Pheidole rogeri Emery 1896

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view
worker dorsal view

major face view

major lateral view


Minor worker: head length 0.90mm, head width 0.75mm, scape length 1.14mm, Webers length 1.32mm (n=1). Head somewhat elongate behind, with vertex collar; promesonotum evenly arched, mesonotal and metanotal grooves weak; propodeal spines very long; face, mesosoma, and gaster covered with faint shagreening, giving violaceous reflections, underlying sculpture generally smooth, with faint punctation on katepisternum and lateral propodeum; dorsal pilosity abundant, long, flexuous; color red.

Major worker: head length 2.68mm, head width 2.46mm, scape length 1.13mm (n=1). Medial face striatofoveolate, with fine, closely-spaced striae longitudinal and radiating obliquely, abrupt transition to smooth and polished laterally and on vertex lobes; hypostomal margin with pair of short, broad, triangular teeth, located about one third distance from midline to recessed teeth flanking mandibles; dorsal pilosity abundant; head with abundant short setae projecting from sides of head in face view.

Similar species: JTL-134.


Costa Rica (Atlantic slope to 800m; type locality "Jimenez," near Guapiles).

Natural History

Inhabits wet forest habitats; nests in soil.

Selected Records

La Selva: at baits.

La Selva: soil excavation at side of trail, obvious nest entrance, but failed to locate colony upon digging.

La Selva: recruiting to lunch scraps; nest in mud bank at side of stream; never found nest center, but did turn up one soldier during excavation.

Braulio Carrillo National Park: collection at 500m.

Rara Avis: Winkler samples.

Penas Blancas Valley: Winkler samples.

Penas Blancas Valley: night collecting in primary forest; large aggregation of minors and soldiers at tip of dead branch.

Guanacaste Conservation Area (Pitilla): Winkler sample.

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: 26 July 2005.
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