Pheidole gigas

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

The type colony was collected in cerrado, or tropical savanna. A seed cache was found in the nest. (Wilson 2003)

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

From Wilson (2003): Known only from the type locality and from Manaus, Amazonas, Brazil, col J. C. Trager.

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • gigas. Pheidole gigas Wilson, 2003: 293, figs. (s.w.) BRAZIL.

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

Description

A large member of the fallax group most similar to Pheidole obscurithorax of Argentina (and exotic in the southern U. S.), and somewhat less so to the Pheidole fallax, Pheidole jelskii and Pheidole puttemansi, differing as follows.

Major: robust; hypostoma 2-toothed; entire head heavily sculptured, with genae, venter, and broad median strip (including frontal lobes) longitudinally carinulate and most of the remainder, from genae to occiput, rugoreticulate; most of pronotal and propodeal dorsa transversely carinulate; anterior strip of first gastral tergite shagreened; promesonotal convexity in dorsal-oblique view strongly lobose and directed posteriorly; petiolar peduncle very thick, petiolar node low; postpetiole laterally angulate, scape broadened at insertion.

Minor: occiput narrow, with nuchal collar; head and pronotum shiny; propodeal spines reduced to denticles.

MEASUREMENTS (mm) Holotype major: HW 2.00, HL 1.96, SL 1.06, EL 0.24, PW 0.94. Paratype minor: HW 0.60, HL 0.80, SL 1.00, EL 0.16, PW 0.46.

COLOR Major: gaster and postpetiole dark reddish brown, rest of body medium reddish brown. Minor: gaster dark reddish brown, rest of body light to medium reddish brown.


Pheidole gigas Wilson 2003.jpg

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

Type Material

BRAZIL: Mun. Anápolis, km 46 on road to Goiania, Goiás, col. William L. and Doris E. Brown. Museum of Comparative Zoology

Etymology

L gigas, giant.

References