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Species: Pheidole fallax   Mayr, 1870 

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Taxonomic History (provided by Barry Bolton, 2018)

Pheidole fallax Mayr, 1870b PDF: 984 (s.) CUBA. Neotropic. AntCat AntWiki HOL

Taxonomic history

Senior synonym of Pheidole rubens: Forel, 1901j PDF: 356; of Pheidole britoi, Pheidole columbica, Pheidole fallacior, Pheidole ovalis: Wilson, 2003A: 290.


Neotropical Region: Americas, Aragua, Atlántida, Brazil, Caribbean, Ceará, Central America, Cienfuegos, Colombia, Costa Rica, Cuba, Demerara-Mahaica, Ecuador, French Guiana, Gracias a Dios, Guadeloupe, Guanacaste, Guatemala, Guyana, Honduras, Izabal, Jamaica, Lara, Magdalena, Martinique, Masaya, Mexico, Nicaragua, Oaxaca, Puerto Rico, Puntarenas, Rio Grande do Sul, Saint Elizabeth, South America, Trelawny, Trinidad and Tobago, Vargas, Venezuela

Distribution Notes:

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.


Natural History:

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.

Taxonomic Treatment (provided by Plazi)

Scientific Name Status Publication Pages ModsID GoogleMaps
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

Specimen Habitat Summary

Found most commonly in these habitats: 3 times found in 2nd growth dry forest, 3 times found in yard around house, 1 times found in dry thorn scrub, 2 times found in agricultural area near forest, 2 times found in dry forest, 1 times found in 2º tropical rainforest, 1 times found in around houses, swept ground, yard trees, low second growth vegetation, 1 times found in bare soil near Raista boat landing, between lawn and trees., 1 times found in secondgrowth rainforest, 2 times found in tropical dry forest, ...

Found most commonly in these microhabitats: 6 times nest in soil, 5 times at bait, 2 times foragers, 1 times large mowed lawn area. Strays., 1 times general collecting, 2 times at bait on ground, 1 times foraging column on ground, 1 times foraging at night, 1 times mound nests in road, 1 times Dry forest. Recruiting to dead insects around station building at night., 1 times large nest emigration, ...

Collected most commonly using these methods: 13 times search, 4 times baiting, 1 times bait, 1 times Ground forager, 1 times Ground nest, 1 times Olive oil bait, 1 times On ground, 1 times Sugar bait.

Elevations: collected from 5 - 1500 meters, 240 meters average

Type specimens: Lectotype of Pheidole fallax: casent0916056; paralectotype of Pheidole fallax: casent0916057; 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

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