 The high degree of polymorphism in this genus is also suggestive of its high degree of advancement.Like "Atta", "Acromyrmex" societies are based on an ant-fungus mutualism, and different species use different species of fungus, but all of the fungi the ants use are members of the genus "Leucocoprinus".The ants actively cultivate their fungus on a medium of masticated leaf tissue.