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Species: Pheidole asperithorax   Emery, 1894 

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Taxonomic History (provided by Barry Bolton, 2019)

Pheidole minutula var. asperithorax Emery, 1894d PDF: 160 (s.w.) BOLIVIA. Neotropic. AntCat AntWiki HOL

Taxonomic history

Subspecies of Pheidole flavens: Emery, 1896g PDF: 77.
Raised to species: Wilson, 2003A: 374.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Bolivia, Brazil, Peru
  Biogeographic regions (According to curated Bioregion/Taxon lists):


J. Longino, 18 Mar 2014: I cannot distinguish Tambopata specimens of this species (det. E. O. Wilson) from my broad concept of P. flavens.

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 asperithorax EmeryHNS, new status

Pheidole minutula var. asperithorax EmeryHNS 1894d: 160. Pheidole flavens subsp. asperithorax EmeryHNS 1896g: 77.

types Mus. Civ. Stor. Nat. Genova.

etymology L asperithoraxHNS, rough thorax, presumably with reference to the liberal amount of sculpturing on the mesosoma.

diagnosis A member of the " flavensHNS complex" within the larger flavensHNS group, including asperithoraxHNS, breviscapaHNS, exiguaHNS, flavensHNS, nuculicepsHNS, orbicaHNS, and sculptiorHNS, as well as the less similar nitidicollisHNS and species placed close to it (see under nitidicollisHNS), and differing by the following combination of traits.

Major: humerus a prominent lobe that rises well above the rest of the promesonotum behind it in dorsal-oblique view; entire dorsal surface of the head, including occiput, all of clypeus, and frontal triangle, covered by parallel longitudinal carinulae; all of pronotal dorsum covered by transverse carinulae; most of dorsal head surface, the promesonotal dorsum, mesopleuron, propodeum, and sides of waist foveolate and opaque, with rest of body smooth and shiny; postpetiolar node from above forming a half-circle; propodeal spines short.

Minor: carinulae present on head anterior to level of eye; dorsum of postpetiolar node and all of gaster smooth and shiny, but all the rest of head and body foveolate and opaque.

Measurements (mm) Lectotype major: HW 0.94, HL 0.96, SL 0.52, EL 0.10, PW 0.50. Paralectotype minor: HW 0.48, HL 0.54, SL 0.44, EL 0.10, PW 0.32. color Major: concolorous medium reddish yellow. Minor: light reddish yellow.

Range In addition to the types, I have seen series from Mato Grosso, Brazil, and near Puerto Maldonado, Tambopata, in the Peruvian Amazon.

biology At Cuzco Amazonico, near Puerto Maldonado, Peru, Stefan Cover (unpublished collection notes) found three colonies of asperithoraxHNS in terra firme and seasonally flooded rainforest, nesting respectively in a rotten log, under the bark of an understory tree, and in a small rotten branch hanging in understory vegetation.

figure Upper: lectotype, major. Lower: paralectotype, minor. BOLIVIA: Salinas, Rio Beni. Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in swamp forest.

Found most commonly in these microhabitats: 1 times under bark of understory tree.

Elevations: collected at 200 m

Type specimens: Lectotype of Pheidole minutula asperithorax: casent0904404; paralectotype of Pheidole minutula asperithorax: casent0904405; syntype of Pheidole flavens asperithorax semipolita: casent0904406, casent0904407; Type of unavailable quadrinomial: Pheidole flavens asperithorax nugax: casent0908263, casent0908264

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