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).

Latitudinal Distribution Pattern

Latitudinal Range: -13.121944° to -27.062055°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.


Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.





The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • 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)

References based on Global Ant Biodiversity Informatics

  • Forel A. 1913. Fourmis d'Argentine, du Brésil, du Guatémala & de Cuba reçues de M. M. Bruch, Prof. v. Ihering, Mlle Baez, M. Peper et M. Rovereto. Bulletin de la Société Vaudoise des Sciences Naturelles. 49: 203-250.
  • Kempf W. W. 1978. A preliminary zoogeographical analysis of a regional ant fauna in Latin America. 114. Studia Entomologica 20: 43-62.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Rosa da Silva R. 1999. Formigas (Hymenoptera: Formicidae) do oeste de Santa Catarina: historico das coletas e lista atualizada das especies do Estado de Santa Catarina. Biotemas 12(2): 75-100.
  • Ulyssea M.A., C. E. Cereto, F. B. Rosumek, R. R. Silva, and B. C. Lopes. 2011. Updated list of ant species (Hymenoptera, Formicidae) recorded in Santa Catarina State, southern Brazil, with a discussion of research advances and priorities. Revista Brasileira de Entomologia 55(4): 603-–611.