Pheidole cramptoni

Longino (1997) found two colonies in primary rainforest on the Costa Rican Atlantic slope, one nesting in a rotting cavity ofa live branch, the other in a dead stick. Douglas Yu (specimen data) discovered a colony in Peru in cavities of the myrmecophyte Cordia nodosa. Colonies have been found in rainforest nesting in dead sticks and in the cavities of live myrmecophytes of the genera Cordia and Piper. Winged reproductives have been collected in nests in different localities from April to November. (Wilson 2003)

Identification
See the description in the nomenclature section.

Distribution
Recorded from Costa Rica; Trinidad and Tobago; Guyana (type locality); Mato Grosso, Brazil; and Amazonian Brazil, Ecuador, and Peru. (Wilson 2003)

This taxon was described from Guyana.

Nomenclature

 *  cramptoni. Pheidole cramptoni Wheeler, W.M. 1916c: 4 (s.w.) GUYANA. Senior synonym of petiolicola: Kempf & Brown, 1968: 97. See also: Wilson, 2003: 677.
 * petiolicola. Pheidole cramptoni subsp. petiolicola Wheeler, W.M. 1921f: 147 (s.w.) GUYANA. Junior synonym of cramptoni: Kempf & Brown, 1968: 97.

Description
From Wilson (2003): DIAGNOSIS Similar to Pheidole hasticeps, Pheidole subarmata, and especially Pheidole synarmata.

Major: in side view frontal lobes project forward as equilateral triangles; humeri angulate, seen from above projecting slightly beyond the rest of the pronotum below it; propodeal spiracle very large, its diameter greater than the base of the propodeal spine in side view; postpetiole oval from above; head bicolored (see Color below); all of frontal lobes and space between frontal carinae filled with carinulae, which reach halfway from the level of the eyes to the level of the occiput.

Minor: propodeal spiracle large, about as wide as the base of the propodeal spine; humerus in dorsal-oblique view angulate; postpetiolar node from side well developed.

MEASUREMENTS (mm) Syntype major: HW 0.96, HL 1.20, SL 0.46, EL 0.10, PW 0.52. Syntype minor: HW 0.52, HL 0.58, SL 0.52, EL 0.08, PW 0.32.

COLOR Major: anterior half of dorsum of head yellow, contrasting with yellowish brown posterior half, also with yellowish brown mid-clypeus, frontal triangle, and antennal fossae; body yellowish brown.

Minor: concolorous yellowish brown.



'''Figure. Upper: syntype, major. Lower: syntype, minor. Scale bars = 1 mm.'''

Type Material
- as reported in Wilson (2003)

Type Locality Information
From Wilson (2003): GUYANA: Kartabo, col. W. M. Wheeler.

Etymology
Eponymous. (Wilson 2003)

Additional References
Wheeler, W. M. 1916. Ants collected in British Guiana by the expedition of the American Museum of Natural History during 1911. Bull. Am. Mus. Nat. Hist. 35: 1–14.

Text and images from this publication used by permission of the author.