Pheidole rudigenis Emery , Wilson, E. O., 2003

Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press, pp. -1--1: 498

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Pheidole rudigenis Emery

new status

Pheidole rudigenis Emery  HNS  , new status

Pheidole flavens subsp. rudigenis Emery  HNS  1906c: 155. Syn.: Pheidole bucolica  HNS  Santschi 1929d: 289, n. syn. (provisional).

types Mus. Civ. Stor. Nat. Genova.

Etymology L rudigenis  HNS  , rough cheek, referring to sculpturing of head.

Diagnosis Similar to species listed in heading above, differing as follows.

Major: shallow antennal scrobes present; occipital lobes and humeri rugoreticulate; dorsal surfaces of head and pronotum otherwise carinulate; dorsal promesonotal profile elevated, strongly convex, mesonotal convexity subangulate; propodeal spines half the length of the propodeal dorsal face; postpetiolar node from above diamond-shaped.

Minor: space between eye and antennal fossa, as well as anterior third of promesonotal dorsum, rugoreticulate; entire head and mesosoma foveolate and opaque; propodeal spines half as long as propodeal basal face; occiput broad and convex.

(The holotype of bucolica  HNS  , placed in provisional synonymy, differs from the rudigenis  HNS  lectotype in its oval postpetiole, as depicted, and more strongly rugulose genae; given its distant origin, in Para, it may be a distinct species.)

Measurements (mm) Lectotype major: HW 1.04, HL 1.02, SL 0.56, EL 0.14, PW 0.50.

Paralectotype minor: HW 0.54, HL 0.60, SL 0.52, EL 0.08, PW 0.36.

color Major: head, mesosoma, and waist light reddish brown; gaster and antennae medium brownish yellow; legs light brownish yellow.

Minor: head and mesosoma medium yellowish brown; waist, gaster, and appendages light yellowish brown.

Range In addition to the types, I have seen a series from Itaunas, Espirito Santo, southeastern Brazil. The holotype of synonymous bucolica  HNS  is from Monte Alegre, Para, in Amazonian Brazil, an anomalous record for the species.

Biology The Itaunas series was collected by R. Paiva inside a nest of a giant ponerine ant, Dinoponera  HNS  sp.; the relationship, if any, is unknown.

figure Upper: lectotype, major (second, lower outline of postpetiole dorsum is of synonymous bucolica  HNS  holotype). Lower: paralectotype, minor. ARGENTINA: San Pedro, Misiones. Scale bars = 1 mm.