Pheidole obscurifrons

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Pheidole obscurifrons
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. obscurifrons
Binomial name
Pheidole obscurifrons
Santschi, 1925

Pheidole obscurifrons casent0913254 p 1 high.jpg

Pheidole obscurifrons casent0913254 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of obscurifrons.


See the description in the nomenclature section.

Keys including this Species


Recorded from Santa Fé and Córdoba, Argentina (Kempf 1972b).

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina (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.

  • obscurifrons. Pheidole (Elasmopheidole) aberrans var. obscurifrons Santschi, 1925e: 158 (s.w.) ARGENTINA. Raised to species: Wilson, 2003: 139.

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


From Wilson (2003): Major: large; yellow; frontal lobes in side view form blunt right angles; in full-face view the mesad anterior border is straight and the lateral anterior border concave, the two coming together as a blunt angle that approaches within an Eye Length of the anterior clypeal border; all of the dorsal surface of the head carinulate except the centers of the clypeus and occiput; upper section of mesopleuron carinulate and foveolate; low, forward-directed process present on postpetiolar venter.

Minor: all of dorsum and sides of head except vertex and frontal triangle carinulate; pronotal dorsum covered by semicircular carinulae; mesopleuron foveolate.

MEASUREMENTS (mm) Lectotype major: HW 1.70, HL 2.00, SL 0.62, EL 0.16, PW 0.90. Paralectotype minor: HW 0.76, HL 0.82, SL 0.62, EL 0.10, PW 0.50.

COLOR Major: concolorous reddish brown.

Minor: concolorous plain yellow.

Pheidole obscurifrons Wilson 2003.jpg

Figure. Upper: lectotype, major. Lower: paralectotype, minor. Scale bars = 1 mm.

Type Labels

Type Material

ARGENTINA: Fives Lille, Santa Fé. Naturhistorisches Museum, Basel - as reported in Wilson (2003)


L obscurifrons, dark or indistinct brown, allusion unknown. (Wilson 2003)


  • Santschi, F. 1925e. Fourmis des provinces argentines de Santa Fe, Catamarca, Santa Cruz, Córdoba et Los Andes. Comun. Mus. Nac. Hist. Nat. "Bernardino Rivadavia" 2: 149-168 (page 158, soldier, worker described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 139, fig. major, minor described. Raised to species)