Atta are a genus of leafcutter ants, the majority of which are in the tribe Attini. There are, however, other groups of ants that cultivate fungus. For example, in the UK, Lasius fuliginosus cultivates fungus in the walls of its nest in order to increase their structural integrity (Schlick Steiner et al 2008).
The range of this genus extends from the southern parts of North America down into South America. It is absent from the very southern most parts of South America.