Acromyrmex ambiguus is a species of New World ants of the subfamily Myrmicinae found in the wild naturally in southern Brazil, Paraguay and Uruguay. Commonly known as "leaf-cutter ants", they are a species of ant from one of the two genera of advanced fungus-growing ants within the tribe Attini.Bolton, B. A new general catalogue of the ants of the world. — Cambridge, Mass.: Harvard University Press, 1995. 504 p.
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