Portrait of Linepithema oblongum, the sister species of the infamous Argentine ant L. humile. Little is known about the biology of this ant, in spite of its close relation to a major pest. Salta, Argentina

Linepithema oblongum carrying a pupa in the brood nest. Carapunco, Tucumán, Argentina

A very young worker ant. Ants begin their adult life as soft, pale creatures. Their integument hardens and strengthens over time. Linepithema oblongum. Carapunco, Tucumán, Argentina