Pheidole stigma

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

Pheidole stigma casent0636799 p 1 high.jpg

Pheidole stigma casent0636799 d 1 high.jpg

Specimen Labels

The type colony was found beneath a rock in a pasture. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Only known from the type locality.

Latitudinal Distribution Pattern

Latitudinal Range: -1.77° to -29.7°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.


Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.





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

  • stigma. Pheidole stigma Wilson, 2003: 234, 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.


Distinguished within the diligens group by the following combination of traits.

Major: pilosity very sparse, generally, and entirely absent on the mesosoma and waist; head light reddish brown with medium brown spot on vertex and medium brown trim on margins of frontal lobes, as illustrated; carinulae limited to anterior half of head, including margins of frontal lobe, and posterior half of dorsal surface of head and all of gaster smooth and shiny; all of mesosoma and waist foveolate and opaque.

Minor: mesosoma devoid of hair; carinulae limited to circular carinulae around antennal fossae; all of mesosoma and petiole, as well as anterior half of head and side of postpetiole, foveolate and opaque, and the rest of the body smooth and shiny; body medium reddish brown, appendages light reddish brown, tarsi yellow.

Compare with Pheidole anima, Pheidole bruesi, Pheidole diligens, Pheidole gagates, Pheidole geraesensis, Pheidole nubila, Pheidole piceonigra, Pheidole radoszkowskii and Pheidole triconstricta.

MEASUREMENTS (mm) Holotype major: HW 0.60, HL 0.64, SL 0.76, EL 0.14, PW 0.40. Paratype minor: HW 1.00, HL 1.00, SL 0.80, EL 0.18, PW 0.52.

COLOR See in Diagnosis above.

Pheidole stigma Wilson 2003.jpg

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

Type Material

ECUADOR: Baños, near Riobamba, 1800 m, col. Gary J. Umphrey. Museum of Comparative Zoology


Gr stigma, mark, spot, with reference to the dark spot on the head of the major.


References based on Global Ant Biodiversity Informatics

  • Boscardin, E. Correa Costa, J. Garlet, A. Bolson Murari, and J. H. C. Delabie. 2011, Comparative evaluation of attractive baits through ant species richness (Hymenoptera: Formicidae) in a Eucalyptus grandis plantation in Santa Maria, Rio Grande do Sul, Brazil. AUGMdomus 3: 10-19.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.