Pheidole grandinodus

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

Pheidole grandinodus usnment00692011 p 1 high.jpg

Pheidole grandinodus usnment00692011 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of grandinodus.


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: Brazil (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.

  • grandinodus. Pheidole grandinodus Wilson, 2003: 699, 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.


DIAGNOSIS A large, yellow member of the tristis group with small eyes, exceptionally large, bell-shaped postpetiolar node, and large, bulging subpostpetiolar process. The propodeal spines are only medium-long, and in the minor fully erect. Seen from behind, the petiolar node of the major is hexagonal, with a flat top and that of the minor strongly convex. Similar to Pheidole alpinensis, Pheidole exarata, Pheidole excubitor, Pheidole gaigei, Pheidole germaini, Pheidole godmani, Pheidole obrima, Pheidole rogeri, Pheidole severini, Pheidole stulta, Pheidole tristis and Pheidole zoster, differing in many details of body form, sculpturing, and pilosity, as illustrated, and in color.

MEASUREMENTS (mm) Holotype major: HW 1.53, HL 1.54, SL 0.82, EL 0.14, PW 0.66. Paratype minor: HW 0.54, HL 0.66, SL 0.74, EL 0.06, PW 0.40.

COLOR Major: head, mesosoma, and appendages reddish yellow; waist and gaster brownish yellow.

Minor: body dark yellow, appendages light.

Pheidole grandinodus Wilson 2003.jpg

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

Type Material

BRAZIL: 66 km north of Manaus on Caracara Road, col. William L. and Doris E. Brown. Museum of Comparative Zoology


L grandinodus, large node, referring to the exceptionally large postpetiolar node.