Pheidole amabilis , Wilson, E. O., 2003

Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press, pp. -1--1: 369

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Pheidole amabilis

new species

Pheidole amabilis  HNS  new species

Types INBio.

Etymology L amabilis  HNS  , 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 angulifera  HNS  , boliviana  HNS  , crinita  HNS  , melastomae  HNS  , mixteca  HNS  , scitula  HNS  , terresi  HNS  , and tysoni  HNS  , 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), amabilis  HNS  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 scrobifera  HNS  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.