Acromyrmex versicolor (Pergande 1894)

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 also occurs 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).

Atta (Moellerius) versicolor Pergande, 1893 PDF: 31 (w.) MEXICO. Nearctic. Primary type information: Calamajué (as Calamujuet) [29°38′N 114°25′W], Baja California, Mexico; CASTYPE00618; BMNH AntCat AntWiki HOL

Taxonomic history

Wheeler, 1907d PDF: 704 (q.m.).Combination in Atta (Acromyrmex): Emery, 1895d PDF: 330.Combination in Atta (Moellerius): Emery, 1905f: 108.Combination in Acromyrmex (Moellerius): Emery, 1924f PDF: 351.Senior synonym of Acromyrmex versicolor chisosensis: Shattuck & Cover, 2016 10.11646/zootaxa.4175.1.2 PDF: 11.See also: Fowler, 1988b: 291.