Current View: All Antweb
Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print: . Accessed

· For web:

Species: Pheidole ulothrix   Wilson, 2003 

Download Data

Taxonomic History (provided by Barry Bolton, 2019)

Pheidole ulothrix Wilson, 2003A: 530, figs. (s.w.) COSTA RICA. Neotropic. AntCat AntWiki HOL


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

Distribution Notes:

Costa Rica (Atlantic slope).


Natural History:

Inhabits wet forest.

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 ulothrixHNS new species

Types INBio.

Etymology Gr ulothrixHNS, woolly haired, referring to the hairs on the mesosomal dorsum.

Diagnosis A medium-sized light brown (major) to yellow (minor) species distinguished in the major by curved, subrecumbent hairs (hence "woolly" hairs) all along the mesosomal dorsum; longitudinal carinulae covering all of the head except the occiput, midclypeus, and frontal triangle; lack of rugoreticulum anywhere; and broadly oval postpetiolar node.

Similar to delicataHNS, but delicataHNS has longer pilosity, none of which is "woolly," shorter propodeal spines, narrow petiolar node apex, and other details in body form, sculpturing, and pilosity as shown. See also the less similar alticolaHNS, chalcaHNS, and hazenaeHNS.

Measurements (mm) Holotype major: HW 0.98, HL 0.96, SL 0.58, EL 0.12, PW 0.46. Minor: HW 0.50, HL 0.54, SL 0.54, EL 0.10, PW 0.30.

color Major: gaster light brown; rest of body, as well as appendages, medium to dark yellow. Minor: gaster brownish yellow, rest of body medium yellow, appendages light yellow.

Range Atlantic slope of Costa Rica (J. T. Longino 1997).

biology Inhabits wet forest (Longino 1997).

Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: Braulio Carillo National Park, Heredia, 500 m (J. T. Longino). Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in rainforest, 1 times found in montane wet forest edge, 1 times found in montane wet forest, 1 times found in wet forest, 1 times found in mature wet forest.

Found most commonly in these microhabitats: 1 times nest in rotten wood, 1 times bajo de M/16, 1 times pan trap, 1 times ex sifted leaf litter.

Collected most commonly using these methods: 1 times search, 1 times flight intercept trap, 1 times miniWinkler, 1 times Pan Trap.

Elevations: collected from 300 - 1000 meters, 544 meters average

Type specimens: holotype major Pheidole ulothrix: inbiocri002279938; Paratype Pheidole ulothrix: inbiocri002279937

See something amiss? Send us an email.