Pheidole angusta

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Pheidole angusta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. angusta
Binomial name
Pheidole angusta
Forel, 1908

Pheidole angusta casent0908214 p 1 high.jpg

Pheidole angusta casent0908214 d 1 high.jpg

Specimen Labels


Nothing is known about the biology of angusta.


See the description in the nomenclature section.

Keys including this Species


Recorded from São Paulo and Rio de Janeiro, Brazil. (Wilson 2003)

Latitudinal Distribution Pattern

Latitudinal Range: -23.7833° to -27.0667°.

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.






Images from AntWeb

Pheidole angusta casent0908215 h 1 high.jpgPheidole angusta casent0908215 p 1 high.jpgPheidole angusta casent0908215 d 1 high.jpgPheidole angusta casent0908215 l 1 high.jpg
Paralectotype of Pheidole angustaWorker. Specimen code casent0908215. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.
Pheidole angusta casent0908217 h 1 high.jpgPheidole angusta casent0908217 p 1 high.jpgPheidole angusta casent0908217 d 1 high.jpgPheidole angusta casent0908217 l 1 high.jpg
Syntype of Pheidole angusta idulisWorker. Specimen code casent0908217. Photographer Will Ericson, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.


Images from AntWeb

Pheidole angusta casent0908216 h 1 high.jpgPheidole angusta casent0908216 p 1 high.jpgPheidole angusta casent0908216 d 1 high.jpgPheidole angusta casent0908216 l 1 high.jpg
Syntype of Pheidole angusta idulisWorker (major/soldier). Specimen code casent0908216. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.


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

  • angusta. Pheidole angusta Forel, 1908c: 373 (s.w.) BRAZIL. Senior synonym of idulis: Wilson, 2003: 167.
  • idulis. Pheidole angusta r. idulis Forel, 1912f: 235 (s.w.) BRAZIL. Junior synonym of angusta: Wilson, 2003: 167.

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


From Wilson (2003): A yellow, long-scaped member of the diligens group similar to Pheidole longiscapa, differing as follows.

Major: dorsal surface of head with sparse long hairs, some longer than Eye Length; antennal scape approaching occipital corner within less than its own maximum width; carinulae of head not extending posteriorly beyond eyes; apex of petiolar node tapering to a near point in side view.

Minor: pilosity of dorsal surface of head and promesonotum sparse, long, some hairs longer than Eye Length; humerus in dorsaloblique view denticulate; petiolar node in side view tapered almost to a blunt point; occiput with nuchal collar.

MEASUREMENTS (mm) Lectotype major: HW 1.12, HL 1.14, SL 0.84, EL 0.18, PW 0.52. Paralectotype minor: HW 0.60, HL 0.74, SL 0.86, EL 0.14, PW 0.40.

COLOR Major and minor: concolorous medium yellow.

Pheidole angusta Wilson 2003.jpg

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

Lectotype Specimen Labels

Type Material

BRAZIL: Ipiranga, São Paulo. Musee d'Histoire Naturelle Genève - as reported in Wilson (2003)


L angusta, narrow, allusion unknown. (Wilson 2003)


References based on Global Ant Biodiversity Informatics

  • Forel A. 1908. Ameisen aus Sao Paulo (Brasilien), Paraguay etc. gesammelt von Prof. Herm. v. Ihering, Dr. Lutz, Dr. Fiebrig, etc. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 58: 340-418.
  • 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).