Pheidole fimbriata

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Pheidole fimbriata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. fimbriata
Binomial name
Pheidole fimbriata
Roger, 1863

Pheidole fimbriata casent0178017 profile 1.jpg

Pheidole fimbriata casent0178017 dorsal 1.jpg

Specimen labels


An inhabitant of tropical forests. At La Selva, Costa Rica, Longino (1997) found large numbers of minors and majors foraging at night over the ground from a soil nest. An incipient colony was discovered in a dead stick on the forest floor. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


One of the most widespread of all Neotropical ant species, recorded from Veracruz, Mexico, through Central and South America (including Trinidad) to Misiones, northern Argentina. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, Venezuela.

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The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • diversa. Pheidole diversa Smith, F. 1860c: 74 (s.w.) BRAZIL. Junior synonym of fimbriata: Kempf, 1965: 183.
  • fimbriata. Pheidole fimbriata Roger, 1863a: 196 (s.) "Rio Paraguay". Mayr, 1887: 598 (w.). Combination in P. (Macropheidole): Emery, 1915i: 190. Senior synonym of diversa, smithii (unnecessary replacement name): Kempf, 1965: 183; of tucumana: Wilson, 2003: 690. [Apparently senior synonym of soesilae.]
  • smithii. Pheidole smithii Dalla Torre, 1892: 90. [Unnecessary replacement name for diversa.] Junior synonym of fimbriata: Kempf, 1965: 183.
  • tucumana. Pheidole fimbriata var. tucumana Forel, 1913l: 228 (s.) ARGENTINA. Forel, 1915c: 355 (w.). Combination in P. (Macropheidole): Emery, 1921f: 81. Junior synonym of fimbriata: Wilson, 2003: 690.

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 A very large, small-eyed species immediately recognizable in the major by the dense fringe of short, suberect to erect hairs on the petiolar peduncle and entire venters of the petiole and postpetiole; the concave profile of the posterior dorsum of the head in side view; the large, stout propodeal spines; and the spinose postpetiolar node.

Minor: very small eyes, angular humerus in dorsal-oblique view, and with a fringe of short hairs on venter of petiole.

MEASUREMENTS (mm) Major (Benjamin Constant, Brazil): HW 2.60, HL 2.88, SL 1.20, EL 0.20, PW 1.06. Minor (Benjamin Constant): HW 0.84, HL 0.90, SL 0.84, EL 0.06, PW 0.52.

COLOR Major: medium to dark reddish brown.

Minor: concolorous brownish yellow.

Pheidole fimbriata Wilson 2003.jpg

Figure. Upper: major. Lower: minor. BRAZIL: Benjamin Constant, Amazonas, col. W. L. Brown. Scale bars = 1 mm.

Type Material

Rio Paraguay. Possibly either Mus. Naturkunde Humboldt-Univ. Berlin, or Paris Museum; not located in this study. (Wilson 2003)


L fimbriata, fringed, probably alluding to the pilosity on the venter of the waist. (Wilson 2003)


  • Emery, C. 1915g. Noms de sous-genres et de genres proposés pour la sous-famille des Myrmicinae. Modifications à la classification de ce groupe (Hymenoptera Formicidae). Bull. Soc. Entomol. Fr. 1915: 189-192 (page 190, Combination in P. (Macropheidole))
  • Kempf, W. W. 1965. Nota preliminar sôbre algumas formigas neotrópicas, descritas por Frederick Smith (Hymenoptera, Formicidae). Rev. Bras. Biol. 25: 181-186 (page 183, senior synonym of diversa and smithii (unnecessary replacement name))
  • Mayr, G. 1887. Südamerikanische Formiciden. Verh. K-K. Zool.-Bot. Ges. Wien 37: 511-632 (page 598, worker described)
  • Roger, J. 1863a. Die neu aufgeführten Gattungen und Arten meines Formiciden-Verzeichnisses nebst Ergänzung einiger früher gegebenen Beschreibungen. Berl. Entomol. Z. 7: 131-214 (page 196, soldier described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 690, fig. major, minor described, Senior synonym of tucumana)