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Species: Pheidole trachyderma   Emery, 1906 

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Taxonomic History (provided by Barry Bolton, 2019)

Pheidole (Pheidole) risi subsp. trachyderma Emery, 1906c PDF: 148 (s.w.q.) ARGENTINA. Neotropic. AntCat AntWiki HOL

Taxonomic history

[Misspelled as Pheidole pachyderma by Santschi, 1912e PDF: 529.].
Raised to species: Wilson, 2003A: 765.


  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 trachyderma EmeryHNS, new status

Pheidole risi subsp. trachyderma EmeryHNS 1906c: 148.

Types Mus. Civ. Stor. Nat. Genova.

Etymology Gr trachydermaHNS, rough skin, alluding to rugoreticulate sculpturing.

diagnosis Similar in various traits to aperHNS, bambusarumHNS, breviconaHNS, dyctiotaHNS, laeviventrisHNS, lutziHNS, rugatulaHNS, senilisHNS, sigillataHNS, and trainiHNS, distinguished as follows.

Major: reddish yellow; all of dorsal surface of head (including frontal lobes) rugoreticulate, except for occiput, antennal fossae, frontal triangle, and clypeus; margins of pronotal dorsum rugulose and humeri rugoreticulate, but rest of promesonotal dorsum almost exclusively foveolate; in side view promesonotum descends to metanotal groove in a near-vertical face; postpetiole from above cone-shaped.

Minor: all of head, mesosoma, and petiole foveolate and opaque, carinulae confined to anterior dorsal surface of head, and rugoreticula wholly lacking; occiput broad, lacking nuchal collar.

Measurements (mm) Lectotype major: HW 1.18, HL 1.18, SL 0.64, EL 0.14, PW 0.66.

Paralectotype minor: HW 0.58, HL 0.62, SL 0.58, EL 0.10, PW 0.40.

Color Major: concolorous medium reddish yellow.

Minor: concolorous light reddish yellow.

Range Known only from the type locality.

Biology Unknown.

Figure Upper: lectotype, major. Lower: paralectotype, minor. ARGENTINA: San Pedro, Misiones. Scale bars = 1 mm.

Specimen Habitat Summary

Type specimens: Lectotype of Pheidole risi trachyderma: casent0904374; paralectotype of Pheidole risi trachyderma: casent0904375

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