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Taxonomic History (provided by Barry Bolton, 2017)

Distribution:

Neotropical Region: Americas, Central America, Chontales, Colombia, Costa Rica, Ecuador, Guanacaste, Guatemala, Heredia, Honduras, Mexico, Napo, Nicaragua, Puntarenas, Sacatepéquez, San José, South America

Distribution Notes:

Mexico to Colombia (type locality Costa Rica) (Fernandez 2003). Costa Rica: montane forests throughout country, becoming less common at lower elevations. Very common in Monteverde cloudforest; rare at La Selva. Material I have seen from Mexico is from cloud forest above 1800m.

Biology:

Natural History:

Inhabits wet forest floor litter. Known from Winkler and Berlese samples.

References:

Fern‡ndez C., F. 2003. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1Ð52.

Menozzi, C. 1931. Contribuzione alla conoscenza del "microgenton" di Costa Rica. III. Hymenoptera - Formicidae. Boll. Lab. Zool. Gen. Agrar. R. Sc. Super. Agric. 25:259-274.

Taxonomic Treatment (provided by Plazi)

Specimen Habitat Summary

Found most commonly in these habitats: 16 times found in montane wet forest, 18 times found in cloud forest, mature but probably disturbed, some big trees, bordering road on steep slope, 13 times found in cloud forest, 11 times found in cloud forest edge, near dairy farm pasture, some big trees in rocky areas, probably disturbed primary or old second growth, on a steep slope, 2 times found in ridgetop cloud forest, oak trees, bamboo, 2 times found in mature wet forest, 1 times found in oak/ostrya forest, 2 times found in riparian forest, cloud forest along stream, near dairy farm pasture, 2nd growth or disturbed primary, 1 times found in wet cloud forest, 2 times found in wet forest, ...

Found most commonly in these microhabitats: 41 times ex sifted leaf litter, 16 times Hojarasca, 9 times ex sifted litter from forest floor, 2 times sifted leaf litter, 1 times sifted litter (leaf mold, rotten wood), 1 times litter sample, 1 times litter.

Collected most commonly using these methods: 32 times miniWinkler, 16 times Mini Winkler, 15 times Winkler, 4 times maxiWinkler, 1 times litter, 1 times Cloud wet moutain forest litter, 1 times wet cloud forest litter.

Elevations: collected from 730 - 2250 meters, 1760 meters average

Type specimens: paratype of Adelomyrmex brevispinosus: casent0901018; syntype of Apsychomyrmex tristani: casent0913951

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