Taxonomy of theCecropia-inhabitingAztecaants

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Abstract
Cecropia trees and several species of the ant genus Azteca form the most conspicuous ant-plant association in the Neotropics. The taxonomy and biology of the Cecropia-associated Azteca are reviewed. A key to queens is provided for the 13 species known to be obligate inhabitants of Cecropia trees, and a key to workers for the five species known from Costa Rica. Taxonomic changes include four new species and extensive synonymy. Individual species accounts contain taxonomic, behavioural, and ecological information. Evolutionary relationships among the species, and the community ecology of the Cecropia-Azteca association, are discussed.