Current View: Bolton World Catalog
Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.14.1. California Academy of Science, online at Accessed .

· For web:

Species: Pheidole heterothrix   Santschi, 1923 

Download Data

Taxonomic History (provided by Barry Bolton, 2020)

Pheidole obtusopilosa st. heterothrix Santschi, 1923d PDF: 59 (s.w.) ARGENTINA. Neotropic. AntCat AntWiki HOL

Taxonomic history

Raised to species and senior synonym of Pheidole gavrilovi: Wilson, 2003A: 436.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Argentina
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press

Pheidole heterothrixHNS Santschi, new status

Pheidole obtusopilosa st. heterothrixHNS Santschi 1923d: 59. Syn.: Pheidole gavrilovi KusnezovHNS 1952d: 80, n. syn. types Naturhist. Mus. Basel.

Etymology Gr heterothrixHNS, different hair (from that of obtusopilosaHNS).

Diagnosis Similar to obtusopilosaHNS in some traits but distinguished from it and other PheidoleHNS species as follows. Major: patch of rugoreticulum present between eye and antennal fossa on each side; entire remainder of dorsal surface of head, including occiput, carinulate; very faint antennal scrobe present; promesonotal profde smoothly rounded; mesonotal convexity low but with distinct anterior and posterior declivities; all of pronotum carinulate; humeri rugoreticulate; pilosity dense and short; postpetiole from above conulate.

Minor: humerus subangulate; propodeal spines robust, moderately long, and directed backward; all of body except gaster foveolate. Measurements (mm) Lectotype major { heterothrixHNS, not " gavriloviHNS "): HW 1.12, HL 1.16, SL 0.54, EL 0.18, PW 0.62. Paralectotype minor: HW 0.54, HL 0.54, SL 0.44, EL 0.10, PW 0.32.

Color Major: all of body light reddish brown except gaster, which is medium reddish brown. Minor: body dark reddish brown, appendages medium reddish brown.

range In addition to the types, from Villaguay, Entre Rios, Argentina, I have seen series from the Argentine provinces of La Pampa, Misiones, and Tucuman.

Biology One series, collected by W. L. Brown at Horco Molle, Tucuman, was found at 900-1150 m in myrtaceous forest.

Figure Upper: major (syntype of synonymous gavriloviHNS). Lower: minor (syntype of synonymous gavriloviHNS). ARGENTINA: Loreto, Misiones, Argentina. Compared with lectotype and paralectotype of heterothrixHNS; upper outlines of minor mesosoma and occiput are those of heterothrixHNS syntype. (Type locality of heterothrixHNS: Villaguay, Entre Rios, Argentina.) Scale bars = 1 mm.

Specimen Habitat Summary

Type specimens: syntype of Pheidole heterothrix: casent0913375, casent0913376

See something amiss? Send us an email.