D. armigerum combines several traits generally noted in some other arboreal ants i.e., populous colonies, large and/or polydomous nests, intra- and interspecific aggressiveness, trophobiosis, and capturing prey by spread-eagling them.

[2] The workers have trap-jaw, hypertrophied mandibles that snap together, triggered by sensory hairs situated on the labrum and powering a killer bite.

[3] The species is distributed throughout northern South America and is known to occur in the terra firma and flooded forests of Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Trinidad, and Venezuela.

This is possible due to the presence of a line of predetermined weakness situated at the base of wings and results in a neat tear usually considered an indication of having mated.

Yet, life for arboreal ants, particularly those species with large colonies, cannot only be based on the results of their predatory activity, so that their ability to exploit different plant-derived food sources such as extrafloral nectar and the honeydew of sap-sucking hemipterans is primordial.

[3] Trophobiosis may be frequent, but can only be confirmed if observers have access to the uppermost part of the canopy or find a colony restricted to low vegetation.

These situations are not entirely peaceful as D. armigerum workers frequently kill the Crematogaster individuals with which they even share trails and rob their prey (cleptobiosis).