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Species: Pheidole gradifer   Wilson, 2003 

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Note: Not a Valid Taxon Name

Current Valid Name:

Pheidole angusticeps

Taxonomic History (provided by Barry Bolton, 2021)

Pheidole gradifer Wilson, 2003a: 613, figs. (s.w.) COSTA RICA. Neotropic. AntCat AntWiki HOL

Taxonomic history

Junior synonym of Pheidole angusticeps: Longino, 2009 PDF: 12.
// Distribution


  Geographic regions: Not found on any curated Geolocale/Taxon lists.

Distribution Notes:

Costa Rica: Guanacaste lowlands.


Natural History:

This species is known from a few dry forest sites in northwestern Costa Rica. The types were from tuna bait, Santa Rosa National Park.


Label data on holotype: Costa Rica: Guanacaste Prov., 1km E Station, Santa Rosa N. P., Trop. dry forest, 280m, tuna bait, 19 October 1992, D. Olson.

A synonym may be P. angusticeps Wilson, with type locality Islas Murcielagas. These are small islands just off the coast in Guanacaste province, and they have a mainland fauna much like dry portions of nearby Santa Rosa National Park.

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 gradiferHNS new species

Types Mus. Comp. Zool. Harvard.

Etymology L gradiferHNS, step-bearing, with reference to the step-like posterior descent.

Diagnosis Unique within the punctatissimaHNS group in the absence of a mesonotal convexity in the major and the manner in which the promesonotum descends almost vertically in side view to the metanotum. In addition, the major has almost no pilosity on the mesosoma or waist; carinulae are present only on the anterior half of the dorsal head surface, but the entire rest of the head, mesosoma, waist, and gastral tergites are foveolate and opaque.

Minor: mesosoma trilobous in dorsal-oblique view; carinulae limited to anterior third of dorsal head surface, but all of head, mesosoma, waist, and central strip of first gastral tergite are foveolate and opaque.

measurements (mm) Holotype major: HW 0.92, HL 1.00, SL 0.64, EL 0.16, PW 0.50.

Paratype minor: HW 0.60, HL 0.64, SL 0.78, EL 0.14, PW 0.38.

Color Major: concolorous light reddish yellow ("orange").

Minor: dark yellow.

RANGE Known only from the type locality.

biology The type series was collected in tropical dry forest (David Olson).

Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: 1 km east of station, Santa Rosa National Park, 280 m (David Olson). Scale bars = 1 mm.

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