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Widespread in the Neotropics from Costa Rica to Argentina, and on many Caribbean islands. Costa Rica: common in northwest (dry forest habitats); also in Coto banana plantation in southwest.
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, and in banana plantations at Coto. 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, pp. -1--1: 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 yard around house, 2 times found in agricultural area near forest, 1 times found in 2nd growth dry forest, 1 times found in 2º tropical rainforest, 1 times found in secondgrowth rainforest, 1 times found in around houses, swept ground, yard trees, low second growth vegetation, 2 times found in tropical dry forest, 1 times found in bare soil near Raista boat landing, between lawn and trees., 1 times found in farmland in karst area, 1 times found in montane wet forest, ...
Collected most commonly using these methods or in the following microhabitats: 13 times search, 4 times baiting, 1 times bait
Elevations: collected from 5 - 1500 meters, 245 meters average
Type specimens: syntype of Pheidole fallax: casent0901589, casent0901590; 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