Pheidole guayasana

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

Pheidole guayasana casent0644211 p 1 high.jpg

Pheidole guayasana casent0644211 d 1 high.jpg

Specimen Labels

The type series was collected from a forest at the base of a mountain, and the nest contained seeds. Winged queens were present in the Rio Palenque nest when found by G. J. Umphrey on 28 July. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Known only from Bucay and Rio Palenque, Ecuador. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador (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.

  • guayasana. Pheidole guayasana Wilson, 2003: 702, figs. (s.w.) ECUADOR.

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


DIAGNOSIS Similar in various characters to Pheidole fullerae, Pheidole gauthieri, Pheidole hetschkoi, Pheidole heyeri, Pheidole napoensis, Pheidole pidax, Pheidole rosae, Pheidole rosula, and especially Pheidole securigera, differing as follows.

Major: brown; frontal lobes extended forward as conspicuous right-angular processes, seen from the side; antennal scrobes present, each followed posteriorly by a patch of rugoreticulum; a very small patch of rugoreticulum present on edge of antennal fossa; occipital lobes in full-face view smoothly rounded; posterior half of pronotal profile flat in dorsal-oblique view; mesonotum and dorsal propodeal face almost entirely free of carinulae; postpetiole spinose.

Minor: propodeal spines reduced to denticles; occiput narrow, with very thin nuchal collar; carinulae on promesonotum mostly limited to anterior and posterior margins; carinulae on head mostly limited to posterior fourth of dorsal head surface.

MEASUREMENTS (mm) Holotype major: HW 1.52, HL 1.64, SL 0.68, EL 0.14, PW 0.74. Paratype minor: HW 0.56, HL 0.60, SL 0.70, EL 0.08, PW 0.38.

COLOR Major: gaster plain dark brown; rest of body, and mandibles, medium reddish brown; other appendages plain dark yellow.

Minor: body plain light brown, appendages dark yellow.

Pheidole guayasana Wilson 2003.jpg

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

Type Material

ECUADOR: 3 km southwest of Bucay, Guayas, col. William L. Brown. Museum of Comparative Zoology


Named based on the Ecuadoran province of the type locality.