Pheidole amazonica

AntWiki: The Ants --- Online
Pheidole amazonica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. amazonica
Binomial name
Pheidole amazonica
Wilson, 2003

Pheidole amazonica casent0282933 p 1 high.jpg

Pheidole amazonica casent0282933 d 1 high.jpg

Specimen Labels

At the type locality in Peru, Stefan Cover (unpublished collection notes) found amazonica to be apparently the most abundant of all Pheidole species, ranging from terra firme forest into seasonally flooded forest and nesting in rotten sticks or branches on the forest floor. Colonies contained several hundred workers and a single queen. No seed caches were found in any of the 21 nests dissected. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Known from the type locality and near Tena, Napo, Ecuador, 600 m. (Wilson 2003)

Latitudinal Distribution Pattern

Latitudinal Range: -0.6258° to -12.497473°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador, Peru (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.


Terra firme forest into seasonally flooded forest.





Images from AntWeb

Pheidole amazonica casent0282041 h 1 high.jpgPheidole amazonica casent0282041 h 2 high.jpgPheidole amazonica casent0282041 p 1 high.jpgPheidole amazonica casent0282041 d 1 high.jpgPheidole amazonica casent0282041 l 1 high.jpg
Not ProvidedWorker. Specimen code casent0282041. Photographer Adam Lazarus, uploaded by California Academy of Sciences. Owned by EPEC.


Images from AntWeb

Pheidole amazonica casent0282933 h 2 high.jpg
Not ProvidedWorker (major/soldier). Specimen code casent0282933. Photographer Adam Lazarus, uploaded by California Academy of Sciences. Owned by EPEC.


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

  • amazonica. Pheidole amazonica Wilson, 2003: 370, figs. (s.w.) PERU.

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


A small, brown member of the flavens group most similar to Pheidole flavifrons but also in various traits to Pheidole arhuaca, Pheidole nitidicollis and Pheidole tenerescens, differing from those species and other members of the flavens group by the combination of traits given in the description.

Major: dorsal half of the posterior head surface in profile flat; occipital margin in full-face view deeply and broadly concave; propodeal spines directed to the rear, not vertical to the basal propodeal face; an indistinct, circular brown spot present on vertex; a patch of rugoreticulum present laterad to each antennal fossa.

Minor: propodeal spines directed backward; humerus in dorsal-oblique view denticulate; occiput narrowed but lacking a nuchal collar; postpetiole from above bell-shaped.

MEASUREMENTS (mm) Holotype major: HW 0.78, HL 0.78, SL 0.40, EL 0.08, PW 0.38. Paratype minor: HW 0.42, HL 0.44, SL 0.38, EL 0.08, PW 0.26.

COLOR Major: body medium brown, with dark brown circular spot on vertex, and anterior one-fourth of head capsule dark yellowish brown; appendages dark yellowish brown.

Minor: body mostly medium brown, with sides of pronotum, nodes of petiole and postpetiole, and first gastral tergite light brown; appendages also light brown.

Pheidole amazonica Wilson 2003.jpg

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

Type Material

PERU: Cuzco Amazónico, 15 km northeast of Puerto Maldonado, Madre de Dios, 200 m, col.Stefan Cover and John E. Tobin. Museum of Comparative Zoology


L amazonica, a reference to the geographical region of origin.


References based on Global Ant Biodiversity Informatics

  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Mertl A. L., J. F. A. Traniello, K. Ryder Wilkie, and R. Constantino. 2012. Associations of two ecologically significant social insect taxa in the litter of an amazonian rainforest: is there a relationship between ant and termite species richness? Psyche doi:10.1155/2012/312054