Pheidole cramptoni

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Pheidole cramptoni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. cramptoni
Binomial name
Pheidole cramptoni
Wheeler, W.M., 1916

Pheidole cramptoni inb0003613109 p 1 high.jpg

Pheidole cramptoni inb0003613109 d 1 high.jpg

Specimen Labels


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)


See the description in the nomenclature section.

Keys including this Species


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

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil, Colombia, Costa Rica, Ecuador, Guatemala, Guyana (type locality), Honduras, Mexico, Panama, Peru, Trinidad and Tobago.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb







Lenko & Brown found this species twice near Manaus, in the heart of Amazoniam Brazil, during 1962. The first collection (M-101) was a large colony or group of colonies found under the bark of a large, punky "white-rotten" log in rain forest at km 40 on the road from Manaus to Itacoatiara, NE of Manaus (27. VIII_1962), The second colony with winged queens was taken in the base of a rotten branch of a tree about 2 m above the ground in second growth forest bordering a plantation of "Brazil" nut or "castanha do Para", at Aleixo, 14 km SE Manaus, on 11.IX. 1961. In Guyana, as indicated by Wheeler, this species has been found nesting in hollow petioles of Tachigalia. (Kempf and Brown 1968).


The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • 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.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original 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.

Pheidole cramptoni Wilson 2003.jpg

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

Type Material

GUYANA: Kartabo, col. W. M. Wheeler. Museum of Comparative Zoology - as reported in Wilson (2003)


Eponymous. (Wilson 2003)