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Widespread in the Neotropics from Nicaragua to Argentina, and on Caribbean islands. Costa Rica: common in northwest (dry forest habitats).
This is a common dry forest species in northwest Costa Rica. Colonies can occur in very open, disturbed areas. For example, they have been observed in the central city park of Liberia. Workers are seed harvesters, and form conspicuous trunk trails to seed sources. They are also generalist foragers and will readily come to baits. Diurnal and nocturnal foraging have been observed. The nests are in bare soil, with conspicuous nest entrances and chaff piles. Workers have a foetid odor when collected. In Santa Rosa National Park, Longino once observed a colony emigration: a thick column of alate queens and brood-carrying workers extended many meters along the edge of a dirt road.
|Pheidole fallax||Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press: 290, (download)||290||20017|
|Pheidole fallax||Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55: 35, (download)||35||21367|
|Pheidole fallax||Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55: 42, (download)||42||21367|
Found most commonly in these habitats: 3 times found in 2nd growth dry forest, 3 times found in dry forest, 1 times found in dry thorn scrub, 2 times found in tropical dry forest, 1 times found in secondgrowth rainforest, 1 times found in banana plantation, 1 times found in montane wet forest, 1 times found in open ground near hotel, 1 times found in riparian dry forest, 1 times found in xeric scrub, ...
Found most commonly in these microhabitats: 3 times nest in soil, 3 times at bait, 1 times general collecting, 2 times at bait on ground, 1 times foraging at night, 1 times foragers, 1 times on ground, 1 times olive oil bait, 1 times nocturnal foragers, 1 times large nest emigration, 1 times ground nest, ...
Collected most commonly using these methods: 6 times search, 2 times baiting, 1 times bait, 1 times at bait|sugar.
Elevations: collected from 6 - 1500 meters, 365 meters average
Type specimens: Lectotype of Pheidole fallax: casent0916056; paralectotype of Pheidole fallax: casent0916057; syntype of Pheidole fallax: casent0901589, casent0901590; syntype of Pheidole fallax columbica: casent0917767, casent0917768; syntype of Pheidole fallax britoi: casent0908130; syntype of Pheidole fallax columbica: casent0908132, casent0908133; syntype of Pheidole fallax ovalis: casent0908131; syntype of Pheidole jelskii fallacior: casent0908140, casent0908141