Pheidole chilensis

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Pheidole chilensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. chilensis
Binomial name
Pheidole chilensis
Mayr, 1862

Pheidole chilensis casent0217902 p 1 high.jpg

Pheidole chilensis casent0217902 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of chilensis.

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

Known from the type collection from Chile; I have further compared a 1961 series from Lima, Peru, with the Mayr types. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Chile (type locality), Peru.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • chilensis. Pheidole chilensis Mayr, 1862: 748 (s.w.q.m.) CHILE. See also: Mayr, 1865: 95; Wilson, 2003: 179.

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

Description

From Wilson (2003): An unusual species, placed in the diligens group but also reminiscent of Pheidole indica, an exotic native to Mediterranean area. P. chilensis may also prove to be an exotic.

Major: lacking the 4-lobed profile and broad, convex metanotum of indica; dorsal surface of the head covered by carinulae except for frontal triangle and midclypeus; carinulae originating on the frontal lobes spread outward as they approach the occiput and then travel back to return to the anterior part of the head in parallel; antennal scrobes present; anterior midclypeal margin excavated; postpetiole from above conulate; all of promesonotum transversely carinulate.

Minor: occiput narrowed and with nuchal collar; postpetiole from above diamond-shaped.

Both castes have abundant, erect hairs on the antennal scapes.

MEASUREMENTS (mm) Lectotype major: HW 1.46, HL 1.48, SL 0.94, EL 0.22, PW 0.62 (may be distorted by pin through pronotum). Paralectotype minor: HW 0.60, HL 0.76, SL 0.94, EL 0.14, PW 0.40.

COLOR Major: body light reddish yellow, gaster light yellowish brown.

Minor: concolorous yellow.

Majors and minors collected in Lima in 1961 are medium reddish brown.


Pheidole chilensis Wilson 2003.jpg

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

Type Material

CHILE: no further data. Naturhistorisches Museum Wien, Vienna - as reported in Wilson (2003)

Etymology

Named after the country of origin. (Wilson 2003)

References

  • Mayr, G. 1862. Myrmecologische Studien. Verh. K-K. Zool.-Bot. Ges. Wien 12: 649-776 (page 748, soldier, worker, queen, male described)
  • Mayr, G. 1865. Formicidae. In: Reise der Österreichischen Fregatte "Novara" um die Erde in den Jahren 1857, 1858, 1859. Zoologischer Theil. Bd. II. Abt. 1. Wien: K. Gerold's Sohn, 119 pp. (page 95, see also)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 179, fig. major, minor described)