Pheidole tetrica

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Pheidole tetrica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. tetrica
Binomial name
Pheidole tetrica
Forel, 1913

MCZ-ENT00032035 Pheidole tetrica hal.jpg

MCZ-ENT00032035 Pheidole tetrica had.jpg

Type Specimen Label

Nothing is known about the biology of tetrica.


See the description in the nomenclature section.

Keys including this Species


From Wilson (2003): Recorded from Santa Catarina and São Paulo, Brazil (Kempf 1972b).

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.

  • tetrica. Pheidole tetrica Forel, 1913l: 226 (s.w.q.) BRAZIL. See also: Wilson, 2003: 524.

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


From Wilson (2003): DIAGNOSIS Similar in various traits to Pheidole tarchon and Pheidole victima, differing as follows.

Major: dorsal surface of head, except for frontal triangle and midclypeus, completely covered with carinulae; pronotum covered by “wraparound” carinulae that circle the dorsum to travel along the lower lateral margin; in dorsal-oblique view propodeum descends anteriorly to metanotal groove through a steep face; propodeal spine almost half as long as propodeal basal face and almost vertical to it; postpetiole from above bluntly spinose.

Minor: widely spaced carinulae cover almost all the dorsal surface of the head, including occiput; center of mesopleuron and center of side of propodeum with longitudinal carinulae; occiput broad, lacking nuchal collar.

MEASUREMENTS (mm) Holotype major: HW 1.08, HL 1.10, SL 0.62, EL 0.16, PW 0.52. Paratype minor: HW 0.52, HL 0.62, SL 0.64, EL 0.12, PW 0.40.

COLOR Major: concolorous yellow with faint reddish tinge.

Minor: concolorous yellow.

Pheidole tetrica Wilson 2003.jpg

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

Syntype Specimen Labels

Type Material

BRAZIL: Ibirama, Santa Catarina. Musee d'Histoire Naturelle Genève, Museum of Comparative Zoology - as reported in Wilson (2003)


L tetrica, harsh, forbidding, allusion unknown. (Wilson 2003)


  • Forel, A. 1913m. Fourmis d'Argentine, du Brésil, du Guatémala & de Cuba reçues de M. M. Bruch, Prof. v. Ihering, Mlle Baez, M. Peper et M. Rovereto. Bull. Soc. Vaudoise Sci. Nat. 49: 203-250 (page 226, soldier, worker, queen described)
  • Kempf, W. W. 1972b. Catálogo abreviado das formigas da região Neotropical. Stud. Entomol. 15: 3–344.
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 524, fig. major, minor described)