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Costa Rica: Atlantic lowlands.
Inhabits lowland rainforest; nests in dead wood on ground.
|Pheidole arachnion||Longino, J. T., 2009, Additions to the taxonomy of New World Pheidole (Hymenoptera: Formicidae)., Zootaxa 2181, pp. 1-90: 13, (download)||13||22820|
|Pheidole arachnion||new species||Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press: 656, (download)||656||20017|
Found most commonly in these habitats: 33 times found in montane wet forest, 21 times found in mature wet forest, 10 times found in cloud forest, primary, along steep ridge near peak, 11 times found in ridgetop cloud forest, isolated peak with oak trees, 5 times found in wet forest, 10 times found in ridgetop cloud forest, 7 times found in cloud forest, primary, near ridgetop, 7 times found in mature rainforest, edge of forest near pasture and agricultural land, steep rocky terrain, 5 times found in lowland rainforest, 3 times found in tropical wet forest, ...
Found most commonly in these microhabitats: 83 times ex sifted leaf litter, 19 times at bait, 12 times Hojarasca, 5 times sifted litter, 2 times Ex sifted leaf litter., 1 times madera podrida, 1 times ex sifted leaf litter and rotten wood, 1 times cosas suspendidas, 1 times bajo de M/08.
Collected most commonly using these methods: 63 times miniWinkler, 19 times baiting, 13 times maxiWinkler, 15 times Winkler, 10 times Mini Winkler, 1 times Search & Berles, 3 times Berlese, 1 times flight intercept trap, 1 times Unknown.
Elevations: collected from 10 - 1140 meters, 714 meters average