Pheidole stulta

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Pheidole stulta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. stulta
Binomial name
Pheidole stulta
Forel, 1886

Pheidole stulta jtlc000014070 profile 1.jpg

Pheidole stulta jtlc000014070 dorsal 1.jpg

Specimen labels


From Wilson (2003): Colonies have been found in a tropical forest (Panama) and coffee plantation at 850 m (Colombia); a nest was found on Barro Colorado in a “well rotted log” (L. Hane, collection note).


See the description in the nomenclature section.

Keys including this Species


As broadly construed, stulta ranges from Bahia in Brazil to Panama (Wilson 2003). It has also been collected in Costa Rica.

Latitudinal Distribution Pattern

Latitudinal Range: 9.152102° to -17.732°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality), Costa Rica, Panama.

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.

  • stulta. Pheidole stulta Forel, 1886b: xlvi (s.) BRAZIL. Senior synonym of championi, sima: Wilson, 2003: 758.
  • championi. Pheidole championi Forel, 1899c: 72, pl. 3, fig. 22 (s.q.) PANAMA. Junior synonym of stulta: Wilson, 2003: 758.
  • sima. Pheidole championii var. sima Forel, 1912f: 234 (s.w.) COSTA RICA. Junior synonym of stulta: Wilson, 2003: 758.

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 large, yellow, sparsely sculptured member of the tristis group.

Major: very prominent, subangulate, pronotal humerus in dorsal-oblique view, no sculpturing behind the posterior half of the head or any part of the body; a cornulate postpetiolar node; and a small but conspicuous rounded subpostpetiolar process. The Colombia syntype major I examined has longitudinal carinulae extending midway up to the center of the dorsum of the head, as opposed to the complete absence of such carinulae in the Panama specimen figured. Further series may indicate that the Central American populations are a distinct species, in which case they would receive the name championi Forel.

Similar to Pheidole absurda, Pheidole alpinensis, Pheidole exarata, Pheidole excubitor, Pheidole germaini, Pheidole gibba, Pheidole grandinodus, Pheidole obrima, Pheidole rogeri, Pheidole spininodis, Pheidole tristis and Pheidole zoster, differing in details of body form, sculpturing, and pilosity, as illustrated, and color.

MEASUREMENTS (mm) Syntype major (Colombia): HW 1.84, HL 2.26, SL 0.84, EL 0.18, PW 0.94. Minor (Barro Colorado Island, Panama): HW 0.60, HL 0.66, SL 0.66, EL 0.06, PW 0.38.

COLOR Major: light reddish yellow.

Minor: medium yellow.

Pheidole stulta Wilson 2003.jpg

Figure. Upper: major. Lower: minor. PANAMA: Barro Colorado Island, col. L. Hane (major compared with stulta syntype from Colombia; queens from the Barro Colorado and syntype series were also matched). Scale bars = 1 mm.

Type Material

Caravelas, Bahia, Brazil. Musee d'Histoire Naturelle Genève - as reported in Wilson (2003)


L stulta, fool, allusion unknown. (Wilson 2003)


  • Forel, A. 1886b. Espèces nouvelles de fourmis américaines. Ann. Soc. Entomol. Belg. 30:xxxviii-xlix. (page xlvi, soldier described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 758, fig. major, minor described, Senior synonym of championi (and its junior synonym sima))

References based on Global Ant Biodiversity Informatics

  • Emery C. 1906. Studi sulle formiche della fauna neotropica. XXVI. Bullettino della Società Entomologica Italiana 37: 107-194.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Field Museum Collection, Chicago, Illinois (C. Moreau)
  • Forel A. 1912. Formicides néotropiques. Part III. 3me sous-famille Myrmicinae (suite). Genres Cremastogaster et Pheidole. Mémoires de la Société Entomologique de Belgique. 19: 211-237.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).