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Species: Trachymyrmex intermedius   (Forel, 1909) 

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Note: Not a Valid Taxon Name

Current Valid Name:

Paratrachymyrmex intermedius

Taxonomic History (provided by Barry Bolton, 2022)

Atta (Trachymyrmex) intermedia Forel, 1909a PDF: 249 (w.) GUATEMALA. Neotropic. Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Guatemala: (no further data) (“received from Pergande”). Primary type depository: MHNG. AntCat AntWiki HOL
// Distribution


  Geographic regions: Not found on any curated Geolocale/Taxon lists.

Distribution Notes:

Guatemala (type locality), Honduras, Mexico, Costa Rica. Costa Rica: Atlantic lowlands, mid-elevation Pacific slope of Cordillera de Tilaran.



Atta (Trachymyrmex) intermedius Forel 1909:249. Worker: Guatemala. Combination in Trachymyrmex: Kempf, 1972:253.

Natural History:

Trachymyrmex intermedius inhabits wet and moist forest habitats. It seems to prefer relatively open areas with a thin litter layer. Nests are in the soil, with a spherical chamber just beneath the surface. The chamber is approximately 5cm diameter, containing a spongy white fungus garden.

At La Selva Biological Station it is relatively common in the laboratory clearing. Various attine researchers, including Jim Wetterer and Ted Schultz, have excavated colonies in the clearing. Azur Moulaert found workers cutting leaves of Callophyllum brasiliense in the open second growth of the La Guaria Annex of La Selva. I have collected ground foragers on the grounds of an ecotourism lodge in Tortuguero and in scrubby second growth forest at 800m on the Pacific slope below Monteverde.

Like Trachymyrmex in general, the species is extremely rare in Winkler samples of sifted litter, suggesting that it avoids areas of deep leaf litter or is poorly sampled by Winkler sifting for some other reason.


Jeffry Sossa examined the types of T. cornetzi and T. intermedius, and kindly pointed out that I had misidentified T. intermedius as T. cornetzi, and that what I had been calling morphospecies JTL-001 was probably T. cornetzi. I have fixed those errors with this version of the page.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in Tropical Hardwood Forest.

Found most commonly in these microhabitats: 1 times large crumb crater, 1 times garden, 1 times chimney nest crater or turret.

Elevations: collected from 101 - 1014 meters, 411 meters average

Collect Date Range: collected between 1972-07-16 00:00:00.0 and 1974-11-21 00:00:00.0

Type specimens:

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