Key to Atta in Central Brazil by Gonçalves. Gonçalves, C. R. 1945. Saúvas do sul e centro do Brasil. Boletim Fitossanitario 2: 183-218
Key to Atta by Thomas Borgmeier , 1959 , Studia Ent. , vol. 2 , fasc 1 - 4 , pp. 321 - 390 . Translated by Marc Van der Stappen (Teleutotje)
For the original article in PDF format, click here (Thanks to Marc Van der Stappen for the link).
Key to the Atta/Acromyrmex in Central America by Roy Snelling
Key to the major workers of Acromyrmex
Key to the Atta in Panama by Neil Weber (PDF)