Pheidole tristis (F. Smith)

Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press : 769

publication ID

20017

DOI

https://doi.org/10.5281/zenodo.6275613

persistent identifier

https://treatment.plazi.org/id/BB5D0CEE-1733-0010-ACBF-24F7B395B575

treatment provided by

Donat

scientific name

Pheidole tristis (F. Smith)
status

 

Pheidole tristis (F. Smith) View in CoL   HNS

Myrmica tristis F. Smith   HNS 1858a: 132, combination to Pheidole   HNS by Mayr 1886c: 360. Syn.: Atta rubra F. Smith   HNS 1858a: 168, combination to Pheidole   HNS by Mayr 1886c: 360 and synonymy by Kempf 1965: 183; Pheidole emeryi   HNS Mayr 1887: 589, synonymy by Kempf 1965: 183; Pheidole crassipes   HNS Mayr 1887: 590, 600, n. syn.; Pheidole emeryi var. alsia   HNS Santschi 1923d: 58, n. syn.

Types Nat. Hist. Mus. London.

Etymology L tristis   HNS , sad, allusion unknown.

Diagnosis A medium-sized reddish-yellow (major) or yellowish brown (minor) member of the tristis   HNS group whose major has very prominent subangulate pronotal humerus, swollen hind femora, diamond-shaped postpetiolar node with subangulate margins, small rounded subpostpetiolar process, and foveolate and opaque gastral tergite.

Minor: large ovoid postpetiolar node, prominent convex subpostpetiolar process, and foveolate and opaque gastral tergites. Similar to balzani   HNS , fabricator   HNS , and nigella   HNS , and less so to brunnescens   HNS , exarata   HNS , excubitor   HNS , germaini   HNS , grandinodus   HNS , hispaniolae   HNS , grantae   HNS , obrima   HNS , prattorum   HNS , rogeri   HNS , sabina   HNS , sarpedon   HNS , stulta   HNS , tristops   HNS , unicornis   HNS , and zoster   HNS , differing in many details of body form, sculpturing, and pilosity, as illustrated, and in color.

measurements (mm) Major (Boraceia Biological Station, Sao Paulo state): HW 1.66, HL 1.76, SL 0.82, EL 0.20, PW 0.84. Holotype minor: HW 0.80, HL 0.84, SL 0.84, EL 0.12, PW 0.52.

Color Major: body and appendages clear light reddish yellow ("orange"), with gaster a shade darker. Minor: concolorous medium yellow brown, in both the Boraceia Biological Station series and holotype minor.

Range Kempf (1972b): southeastern Brazil (Santa Catarina, Sao Paulo, Rio de Janeiro, Parana) and north central Argentina (Misiones).

Biology Unknown.

Figure Upper: major (Boraceia Biological Station, Mun. Salesopolis, Sao Paulo state, Brazil, William L. Brown), associated with minors compared by E. O. Wilson with holotype minor from Tijuca, Rio de Janeiro, Brazil. At the bottom the right hind femur is depicted. Lower: holotype, minor (from Tijuca, Brazil). Scale bars = 1 mm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Pheidole

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