Taxonomic History (provided by Barry Bolton, 2014)
genus is primarily Neotropical; Nearctic range: CA, AZ and likely NM. Collected from the Chiricahua Mtns, Cochise Co., Arizona.
Habitat in Southwest:
nests in the soil, and forages in columns, collecting leaves and pieces of
leaves ranging from mesquite (Prosopsis
spp.), Jatropha dioica
), buffalo gourd (Curcubita foetidissima
) to composite
seeds. Nests are large, with probably several thousand workers.
1907, 1911, 1917; Weber, 1972; Rojas-Fernndez and Fragoso, 1994, 2000.
(From Mackay and Mackay, 2002)
Identification in the Nearctic Southwest: the frontal
carinae extend about the length to the occiput, and the occipital lobes are
covered with coarse rugae. The mesosoma has numerous spines and the gaster is
covered with tubercles
. Ants of this genus have 11 segmented antennae in which
the insertion is hidden by the frontal lobes. Most tubercles and spines have a
curved, coarse hair. In North America, it could only be confused with Trachymyrmex
, from which it differs in
being polymorphic. Atta
in the United States (southern AZ, southern TX), and is similar to Acromyrmex
, but differs in that the
dorsum of the gaster is smooth (no tubercles).
(From Mackay and Mackay, 2002).
Mackay, W.P. and Mackay, E.E. (2002). The ants of New Mexico (Hymenoptera: Formicidae). The Edwin Mullen Press, Lewiston: 400 pp.
Taxonomic Treatment (provided by Plazi)
Specimen Habitat Summary
Found most commonly in these habitats: 1 times found in Sonoran desert wash, 1 times found in cactus-ocotillo desert, 1 times found in creosote bush-mesquite desert, 1 times found in desert woodland, 1 times found in dry cactus plain, 1 times found in dry wash, 1 times found in Mixed desert woodland, 1 times found in Port of entry, 1 times found in Chihuahuah desert scrub
Collected most commonly using these methods or in the following microhabitats: 1 times under boulder, 1 times pitfall traps, 1 times under rock
Elevations: collected from 470 - 860 meters, 613 meters average
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