Pheidole pidax

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

The type colony was collected in montane rainforest. Winged queens were present on 28 July.


See the description in the nomenclature section.

Keys including this Species


Only known from the type locality.

Latitudinal Distribution Pattern

Latitudinal Range: 8.699039° to 8.699039°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia (type locality).

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.

  • pidax. Pheidole pidax Wilson, 2003: 732, figs. (s.w.) COLOMBIA.

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


DIAGNOSIS Sharing some traits with Pheidole guayasana, Pheidole rhytifera, Pheidole rosae, Pheidole rosula, Pheidole securigera, as well as others with some members of the flavens group, distinguished as follows.

Major: frontal lobes extended forward as blunt right-angular processes; shallow antennal scrobes present; propodeal spines half as long as basal propodeal face anterior to them; hypostoma 2-toothed; humerus in dorsal-oblique view very prominent, right-angular; carinulae originating on frontal lobes and seen in full-face view spread outward, away from the midline, for their entire length.

Minor: propodeal spines half as long as basal propodeal face and curved strongly backward; all of head, mesosoma, and petiole foveolate and opaque.

MEASUREMENTS (mm) Holotype major: HW 1.24, HL 1.56, SL 0.62, EL 0.22, PW 0.64. Paratype minor: HW 0.56, HL 0.60, SL 0.62, EL 0.12, PW 0.38.

COLOR Major: body brownish yellow, appendages plain medium yellow.

Minor: concolorous medium yellow.

Pheidole pidax Wilson 2003.jpg

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

Type Material

COLOMBIA: Queremal, Rio San Juan, Valle, 1300 m, col. William L. Brown. Museum of Comparative Zoology


Gr pidax, fountain, referring to the spray-like pattern of the cephalic carinulae.


References based on Global Ant Biodiversity Informatics

  • Wilson E. O. 2003. Pheidole in the New World. A dominant, hyperdiverse ant genus. Cambridge, Mass.: Harvard University Press, [ix] + 794 pp.