Pheidole vallifica

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Pheidole vallifica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. vallifica
Binomial name
Pheidole vallifica
Forel, 1901

Pheidole vallifica casent0178065 profile 1.jpg

Pheidole vallifica casent0178065 dorsal 1.jpg

Specimen labels

In 1896, Auguste Forel (1901) found colonies of this "singuliere espece, une des plus curieuses du genre," at San Antonio, Colombia, in humid, sandy soil at the edge of a small stream. The small nests, which had few minors and only one or two majors, had small entrances abutted by semicircular piles of excavated soil. I found vallifica common in a banana plantation at Palmar Sur, at the base of Costa Rica's Osa Peninsula, where colonies nested in open soil. (Wilson 2003)

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

Honduras, Costa Rica, Colombia, Brazil (Mato Grosso), and Paraguay (Amambay). (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil, Colombia (type locality), Costa Rica, Honduras, Paraguay.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Minor

Nomenclature

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

  • vallifica. Pheidole vallifica Forel, 1901e: 357 (s.w.) COLOMBIA. Combination in P. (Elasmopheidole): Forel, 1913k: 43. See also: Wilson, 2003: 774.

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): DIAGNOSIS An unusual member of the tristis group, of uncertain affinity.

Major: frontal lobes in full-face view square, turned obliquely outward; from the side the lobes project as an acute angle, as does the clypeus beneath them; carinulae limited to head at eye level and anterior to it, and body is otherwise almost completely smooth and shiny; propodeal spines reduced to oblique angles; postpetiole conulate.

Minor: basal face of propodeum and dorsal surface of head from eyes forward carinulate, and rest of body almost completely smooth and shiny; propodeal spines reduced to right angles.

MEASUREMENTS (mm) Syntype major: HW 1.12, HL l.22, SL 0.60, EL 0.18, PW 0.60. Syntype minor: HW 0.60, HL 0.66, SL 0.58, EL 0.12, PW 0.42.

COLOR Major (Palmar Sur, Costa Rica): light reddish brown, appendages yellowish brown. Minor: plain light brown, appendages brownish yellow.


Pheidole vallifica Wilson 2003.jpg

Figure. Upper: major (Palmar Sur, Puntarenas, Costa Rica), compared with syntype in Forel Collection. Lower: syntype, minor. Scale bars = 1 mm.

Syntype Specimen Labels

Type Material

San Antonio, Sierra Nevada de Santa Marta, Colombia, over 1000 m. Musee d'Histoire Naturelle Genève - as reported in Wilson (2003)

Etymology

L vallifica, of a valley, allusion uncertain. (Wilson 2003)

References

  • Forel, A. 1901j. Variétés myrmécologiques. Ann. Soc. Entomol. Belg. 45: 334-382 (page 357, soldier, worker described)
  • Forel, A. 1913l. Wissenschaftliche Ergebnisse einer Forschungsreise nach Ostindien ausgeführt im Auftrage der Kgl. Preuss. Akademie der Wissenschaften zu Berlin von H. v. Buttel-Reepen. II. Ameisen aus Sumatra, Java, Malacca und Ceylon. Gesammelt von Her (page 43, Combination in P. (Elasmopheidole))
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 774, fig. major, minor described)