Pheidole bison

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

Pheidole bison jtlc000016329 p 1 high.jpg

Pheidole bison jtlc000016329 d 1 high.jpg

Specimen Labels

The type series was collected by Philip S. Ward from a termite nest in savanna. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Only known from the type locality.

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb







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

  • bison. Pheidole bison Wilson, 2003: 665, figs. (s.w.) BOLIVIA.

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


DIAGNOSIS A medium-sized member of the tristis group similar to Pheidole bellatrix, Pheidole napoensis and Pheidole pullula, differing as follows.

Major: promesonotum a single massive piece, its dorsal border forming a single convexity that drops vertically at the rear to the metanotum; head entirely covered with longitudinal carinulae except for frontal triangle and central section of clypeus; space between eye and antennal fossa rugoreticulate; petiolar node in side view tapered apically to a blunt point; postpetiolar node from above trapezoidal.

Minor: almost all of head and mesosoma foveolate and opaque; irregular broken rugulae present on posterior dorsal head surface; propodeal spines reduced to denticles; occiput broad, weakly concave.

MEASUREMENTS (mm) Holotype major: HW 1.26, HL 1.30, SL 0.76, EL 0.12, PW 0.60. Paratype minor: HW 0.62, HL 0.64, SL 0.64, EL 0.08, PW 0.44.

COLOR Major: head dark reddish brown, rest of body medium reddish brown, appendages light reddish brown.

Minor: concolorous brownish yellow.

Pheidole bison Wilson 2003.jpg

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

Paratype Specimen Labels

Type Material

BOLIVIA: La Games, Parque Nacional Noel Kempff Mercado, Santa Cruz, 14°48'S 60°23'W, 700 m, col. Philip S. Ward. Museum of Comparative Zoology


L Gr bison, the wisent (European bison), alluding to the massive humped back of the major.