Current View: All Antweb
Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.86.1. California Academy of Science, online at Accessed .

· For web:

Species: Pheidole christopherseni   Forel, 1912 

Download Data

Current Valid Name:

Taxonomic History (provided by Barry Bolton, 2023)

Pheidole christopherseni Forel, 1912g PDF: 229 (s.w.) PANAMA. Neotropic. Primary type information: Primary type material: syntype major workers, syntype minor workers (numbers not stated). Primary type locality: Panama: (no further data) (Christophersen). Primary type depository: MHNG. AntCat AntWiki HOL

Taxonomic history

Status as species: Emery, 1922c PDF: 107; Kempf, 1972b PDF: 189; Bolton, 1995b: 319; Wilson, 2003a: 400 (redescription); Longino, 2019 PDF: 70.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Colombia, Costa Rica, Honduras, Mexico, Panama
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:

Colombia, Costa Rica, Panama (type locality). Costa Rica: Atlantic lowlands.


Natural History:

Arboreal; nesting in small cavities in live plant stems.

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 christopherseniHNS Forel

Pheidole christopherseniHNS Forel 1912g: 229.

Types Mus. Hist. Nat. Geneve.

Etymology Eponymous.

Diagnosis One of the most distinctive of all PheidoleHNS species, marked by extremely small size, greatly elongated head of the major, and almost complete lack of carinulae anywhere on the bodies of major and minor, even around the antennal fossae and on the metapleural gland bulla. In some series at least, majors have faint longitudinal carinulae on the frontal lobes, and both castes have a few such traces on sides of the head anterior to the eyes.

Measurements (mm) Syntype major: HW 0.34, HL 0.40, SL 0.34, EL 0.06, PW 0.24. Minor not measured.

Color Major: concolorous medium yellow. Minor: concolorous pale yellow.

range In addition to the type locality (Panama), Longino (1997) has recorded christopherseniHNS from the Atlantic lowlands of Costa Rica and the TayronaHNS National Park of Colombia.

Biology In Costa Rica, christopherseniHNS has been found in rainforest to 600 m, and in Colombia once in seasonal dry forest. This bizarre little species is strictly arboreal so far as is known. The type colony was nesting in a "very thin hollow stem" (Forel). Longino (1997) reports colonies from Costa Rica in the live, hollow stems of Bauhinia vines (a legume), as well as in a bignoniaceous liana, a small tree, and Cecropia saplings.

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

Specimen Habitat Summary

Found most commonly in these habitats: 4 times found in mature wet forest, 9 times found in montane wet forest, 2 times found in wet forest edge, 2 times found in moist forest, 1 times found in rainforest, 1 times found in wet forest, 1 times found in Primary forest at river edge, 1 times found in dry forest, 2 times found in tropical rainforest, 2 times found in tropical rainforest, old second growth, ...

Found most commonly in these microhabitats: 4 times ex live stem Myriocarpa, 2 times nest in live stems Myriocarpa, 1 times in live stem Bignoniaceae liana, 1 times nesting in live stem Bauhinia in recent treefall, 1 times in live stems, 1 times In Cecropia peltata sapling, 1 times in Cecropia insignis sapling, 3 times beating vegetation, 3 times beating veg., 1 times nest in live stem Myriocarpa, 2 times Malaise trap, ...

Collected most commonly using these methods: 7 times search, 6 times beating, 6 times Malaise, 5 times Foggin, 4 times Fogging.

Elevations: collected from 50 - 800 meters, 294 meters average

Collect Date Range: collected between 1985-02-28 00:00:00.0 and 2020-01-26 00:00:00.0

Type specimens: syntype of Pheidole christopherseni: casent0908258, casent0908259

See something amiss? Send us an email.
Log In to see maps.