Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.58.1. California Academy of Science, online at Accessed .

· For web:

Species: Pheidole otisi   Wilson, 2003 

Download Data

Taxonomic History (provided by Barry Bolton, 2021)

Pheidole otisi Wilson, 2003a: 481, figs. (s.w.) COSTA RICA. Neotropic. AntCat AntWiki HOL
// Distribution


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

Distribution Notes:

Costa Rica (Atlantic and southern Pacific lowlands).


Natural History:

Inhabits wet forest leaf litter; nests in dead wood; forages on ground and in low vegetation.

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 otisiHNS new species

Types Mus. Comp. Zool. Harvard.

Etymology Acronymic, referring to the Organization of Tropical Studies, sponsoring organization of the La Selva Biological Station, site of the type collection.

diagnosis A small, yellow species in the flavensHNS group similar to longinoiHNS and prolixaHNS, distinguished in the major by a brown spot on the vertex of the yellow head; by the very low mesonotal convexity; stout, posteriorly directed propodeal spines; and absence of carinulae over most of the frontal lobes and entire middle half of the cephalic dorsum; and in the minor by the absence ofa central convexity in the mesonotum, which drops steeply at the rear to the metanotal groove. measurements (mm) Holotype major: HW 0.58, HL 0.66, SL 0.30, EL 0.08, PW 0.38. Paratype minor: HW 0.36, HL 0.38, SL 0.30, EL 0.06, PW 0.24.

color Major: gaster and appendages clear light yellow, rest of body medium yellow, with a contrasting fuzzily defined brown spot 0.1 mm across in the middle of the head one-third forward from the occipital border. Minor: concolorous medium yellow.

range The Atlantic and Pacific lowlands of Costa Rica (J. T. Longino 1997).

Biology According to Longino (1997), the species nests in pieces of dead wood in the ground litter of lowland wet forest, including beneath the bark of rotten logs. It forages on the ground and in low vegetation, and workers have been observed at extrafloral nectaries of Passiflora pittieri.

Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: La Selva Biological Station, near Puerto Viejo, Heredia (Stefan Cover and Mark Moffett). Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 72 times found in tropical wet forest, 77 times found in tropical rainforest, 38 times found in mature wet forest, 15 times found in montane wet forest, 12 times found in 2º lowland rainforest, 12 times found in rainforest, 12 times found in lowland rainforest, 3 times found in wet forest, 2 times found in STR, 1 times found in Parc. sucesionales, ...

Found most commonly in these microhabitats: 93 times at bait, 124 times ex sifted leaf litter, 1 times nest in dead wood on ground, 1 times Mature lowland rainforest. Under bark on fallen log., 1 times Ex sifted leaf litter., 1 times at baits, 1 times on extrafloral nectaries, 1 times Hojarasca, 1 times ex sifted litter, 1 times beating vegetation, 1 times bajo de M/28, ...

Collected most commonly using these methods: 88 times Baiting, 99 times miniWinkler, 20 times MaxiWinkler, 8 times Winkler, 11 times Mini Winkler, 5 times search, 7 times Foggin, 3 times bait, 3 times flight intercept trap, 1 times Unknown, 2 times Berlese, ...

Elevations: collected from 10 - 1170 meters, 292 meters average

Collect Date Range: collected between 1979-02-02 and 2020-01-27

Type specimens: paratype Pheidole otisi: jtlc000016477

See something amiss? Send us an email.