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Species: Pheidole senilis   Santschi, 1929 

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Taxonomic History (provided by Barry Bolton, 2019)

Pheidole hetschkoi var. senilis Santschi, 1929d PDF: 289 (w.) BRAZIL. Neotropic. AntCat AntWiki HOL

Taxonomic history

Raised to species: Wilson, 2003A: 752.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Brazil
  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 senilisHNS Santschi, new status

Pheidole hetschkoi var. senilisHNS Santschi 1929d: 289.

Types Naturhist. Mus. Basel.

Etymology L senilisHNS, old, aged, probably alluding to the wrinkly head surface.

diagnosis Similar to aperHNS, bambusarumHNS, breviconaHNS, dyctiotaHNS, laeviventrisHNS, lutziHNS, risiiHNS, rugatulaHNS, sigillataHNS, trachydermaHNS, and trainiHNS, differing as follows.

Major: very large; in full-face view, occiput covered by faint oblique carinulae that originate on midline and turn outward; most of vertex and sides of head rugoreticulate, frontal lobes carinulate; in full-face view, semicircular carinulae of antennal fossa are sharply demarcated from the carinulae that cross over anteriorly to the lateral wings of the clypeus; pronotal dorsum loosely rugoreticulate, with sides and lower half of the mesopleuron smooth; postpetiole 2X broader than petiole, and spinose.

Minor: posterior dorsum and sides of head "tiger-striped" with semicircular carinulae; humeri rugoreticulate; occiput narrow, with nuchal collar.

Measurements (mm) Major (Agua Funda, Sao Paulo): HW 2.20, HL 2.34, SL 1.00, EL 0.24, PW 1.04.

Lectotype minor: HW 0.80, HL 0.84, SL 0.94, EL 0.16, PW 0.56.

color Major and minor: body medium reddish brown, appendages reddish yellow.

Range Minas Gerais and Sao Paulo states, Brazil.

Biology The Agua Funda colony was collected in rotten wood.

Figure Upper: major (Agua Funda, near Sao Funda, Sao Paulo; W. L. Brown; associated with minor compared with lectotype minor). Lower: minor (Agua Funda, Sao Paulo; compared with lectotype minor). (Type locality: Passa Quatro, Minas Gerais, Brazil; no majors were in type series.) Scale bars = 1 mm.

Specimen Habitat Summary

Type specimens: Lectotype of Pheidole senilis: casent0913336

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