Pheidole fracticeps

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

Pheidole fracticeps casent0178024 profile 1.jpg

Pheidole fracticeps casent0178024 dorsal 1.jpg

Specimen labels

Probably a rainforest species. The South American specimens were taken variously from leaf litter and soil. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Known from the type locality (Trinidad); Yasuni Research Station, Puerto Tiputini, Yasuni National Park, Ecuador; two series from Brazil; and Reserva Mbaracayú, Dept. Canindeyú, Paraguay. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil, Ecuador, Paraguay, Peru, Trinidad and Tobago (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.

  • fracticeps. Pheidole fracticeps Wilson, 2003: 133, figs. (s.w.) TRINIDAD.

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


A member of the aberrans group closest to the Argentine species Pheidole lilloi, differing from it and other species in the group by the following set of traits.

Major: very small; yellow; hypostoma 4-toothed; in side view, occiput juts out like a brow, with the principal transverse carina (in profile) giving it a sharp edge, and the profile of the head below it dipping away as a strong concavity; in full-face view, occiput bearing the principal demarcating transverse carina plus several others that cross as irregular lines; eye elliptical, placed forward to a little more than an Eye Length from the anterior genal border.

Minor: dorsal surface of head and most of mesosoma and waist foveolate, with a near absence of carinulae overall.

MEASUREMENTS (mm) Holotype major: HW 0.68, HL 0.86, SL 0.30, EL 0.10, PW 0.40. Paratype minor: HW 0.38, HL 0.44 (approximately), SL 0.34, EL 0.06, PW 0.24.

COLOR Major: concolorous medium yellow. Minor: concolorous yellow.

Pheidole fracticeps Wilson 2003.jpg

Figure. Upper: holotype, major. Lower: paratype, minor (head partly crushed). Scale bars = 1 mm.

Type Material

TRINIDAD: Maracas Valley col. N. A. Weber, May 1936. Museum of Comparative Zoology


L fracticeps, broken head, from the appearance of the major occiput.