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Species: Pheidole amabilis   Wilson, 2003 

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Taxonomic History (provided by Barry Bolton, 2022)

Pheidole amabilis Wilson, 2003a: 369, figs. (s.w.) COSTA RICA. Neotropic. Primary type information: Primary type material: holotype major worker. Primary type locality: Costa Rica: Alajuela, Rio Peñas Blancas, 10°19’N, 84°42’W, 800 m. (J.T. Longino). Primary type depository: INBC. Secondary type information: Secondary type material: 1 paratype minor worker. Secondary type locality: same as for holotype. Secondary type depository: INBC. Type notes: Details of paratype castes and their numbers are not given. AntCat AntWiki HOL

Taxonomic history

// Distribution


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

Distribution Notes:

Costa Rica: Atlantic slope to 1100m.


Natural History:

This species occurs in wet forest. Workers have not been observed at baits or in Winkler samples. Three nests have been observed in Cecropia sapling internodes, one in the foliar pouches of a myrmecophytic melastome, and one in a dead stick in the leaf litter. When the dead stick was cracked, two Pheidole nests were found, one of this species and one of Pheidole scrobifera (JTL0219). The two nests were separated by a 1cm plug of sawdust. When they mixed, fighting ensued.

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 amabilisHNS new species

Types INBio.

Etymology L amabilisHNS, lovely.

Diagnosis A medium-sized, concolorous yellow species whose major is distinguished by the slightly concave profile of the posterior half of the head capsule; also possessing a carpet of dense, evenly short, forward-projecting, subdecumbent (45A°-angled from surface) hairs on the posterior half of the head and occiput; weak but distinct mesonotal convexity; and short, nearly vertical propodeal spines.

Similar to anguliferaHNS, bolivianaHNS, crinitaHNS, melastomaeHNS, mixtecaHNS, scitulaHNS, terresiHNS, and tysoniHNS, but readily distinguished by the above traits as well as by various differences in sculpture and color.

Measurements (mm) Holotype major: HW 0.94, HL 1.14, SL 0.52, EL 0.14, PW 0.48.

Paratype minor: HW 0.60, HL 0.66, SL 0.60, EL 0.14, PW 0.36.

color Major: concolorous medium yellow.

Minor: gaster dark yellow, rest of body medium yellow.

Range Reported by John T. Longino (1997) from the Atlantic slope of Costa Rica to 1100 m.

Biology According to Longino (1997), amabilisHNS occurs in wet forest. Nests have been found in Cecropia sapling internodes, in foliar pouches of a myrmecophytic melastome, and in a dead stick in leaf litter. The colony in the dead stick was separated from a colony of Pheidole scrobiferaHNS by a plug of woody frass; fighting between the two species ensued when the plug was removed.

figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: Rio Penas Blancas, Alajuela, WWN 84A°42 W, 800 m (J. T. Longino). Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 24 times found in montane wet forest, 4 times found in wet forest, 1 times found in mature wet forest/2nd growth edge, 1 times found in mature wet forest, 1 times found in mesophil forest, 1 times found in rainforest.

Found most commonly in these microhabitats: 1 times under epiphytes in treefall, 1 times in Cecropia insignis sapling, 1 times nest in Cecropia insignis, 1 times from domatia on Tococa leaves, 1 times ex sifted leaf litter, 1 times bajo de M/16, 1 times bajo de M/06, 1 times Sobre Vegetacion, 1 times Muestra tomada alrrededor de M/20, 1 times Malaise trap, 1 times in dead stick in litter, ...

Collected most commonly using these methods: 21 times Malaise, 1 times search, 2 times flight intercept trap, 1 times Berlese, 1 times MiniWinkler, 1 times Sweeping.

Elevations: collected from 5 - 1100 meters, 504 meters average

Collect Date Range: collected between 1985-03-15 00:00:00.0 and 2010-03-01 00:00:00.0

Type specimens: holotype major Pheidole amabilis: inbiocri002279941; Paratype Pheidole amabilis: casent0610089, casent0610090; paratype Pheidole amabilis: inbiocri001280274, inbiocri001280310, inbiocri002279939, inbiocri002279942

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