Pheidole indagatrix

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Pheidole indagatrix
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. indagatrix
Binomial name
Pheidole indagatrix
Wilson, 2003

Pheidole indagatrix casent0617815 p 1 high.jpg

Pheidole indagatrix casent0617815 d 1 high.jpg

Specimen Labels

According to Longino (1997), indagatrix occurs in moist to wet forests, both on the ground and in the canopy, and forages both day and night. It is equally flexible in nesting sites, with colonies having been found variously in and under dead wood on the ground, and in one case each, under accreted soil on the side of a tree trunk and in a hollow live stem. Winged males have been found in nests in January and March. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


A common species in Costa Rica from Meseta Central northward, up to 1500 m (Longino 1997).

Latitudinal Distribution Pattern

Latitudinal Range: 15.7440821° to 9.904666°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality), Honduras, Nicaragua, Panama.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb







The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • indagatrix. Pheidole indagatrix Wilson, 2003: 304, figs. (s.w.) COSTA RICA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.


A member of the fallax group with some similarities to Pheidole haskinsorum, Pheidole hector and Pheidole nubicola, distinguished as follows.

Major: antennal scape surpasses occipital corner by about its own maximum width; frontal lobes mostly rugoreticulate; pilosity dense and long over all the body, many hairs longer than Eye Length; rugoreticula mesad to each eye extend most of the way to the anterior border of head; all of posterior half of dorsal surface of head punctate and opaque, as well as most of pronotum; anterior half of central strip of first gastral tergite shagreened; propodeal spines long and thin; postpetiole from above diamond-shaped.

Minor: propodeal spines long and thin; pilosity dense, with many hairs as long as Eye Length; occiput narrow, with nuchal collar.

MEASUREMENTS (mm) Holotype major: HW 1.18, HL 1.26, SL 1.10, EL 0.20, PW 0.60. Paratype minor: HW 0.60, HL 0.80, SL 1.04, EL 0.20, PW 0.42.

COLOR Major: body and mandibles medium reddish brown; gaster medium brown; legs and antennae light reddish brown except for the tarsi, which are yellow.

Minor: body and mandibles medium reddish brown; rest of appendages yellowish brown.

Pheidole indagatrix Wilson 2003.jpg

Figure. Upper: holotype, major. Lower: paratype, minor. Scale bars = 1 mm.

Type Material

COSTA RICA: 3–5 km east of Turrialba, col. William L. Brown. Museum of Comparative Zoology


L indagatrix, huntress.


References based on Global Ant Biodiversity Informatics

  • Longino J. T. L., and M. G. Branstetter. 2018. The truncated bell: an enigmatic but pervasive elevational diversity pattern in Middle American ants. Ecography 41: 1-12.
  • Longino J. T., and R. K. Colwell. 2011. Density compensation, species composition, and richness of ants on a neotropical elevational gradient. Ecosphere 2(3): 16pp.
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at
  • Ottonetti L., L. Tucci, F. Frizzi, G. Chelazzi, and G. Santini. 2010. Changes in ground-foraging ant assemblages along a disturbance gradient in a tropical agricultural landscape. Ethology Ecology & Evolution 22: 73–86.