Abstract
The phylogenetic relationships among the four tribes of corbiculate bees (Euglossini, Bombini, Meliponini, and Apini) are controversial. There is substantial incongruence between morphological and molecular data, and the single origin of eusociality is questionable. The use of behavioral characters by previous workers has been restricted to some typological definitions, such as solitary and eusocial. Here, I expand the term “social” to 42 characters and present a tree based only on behavioral characters. The reconstructed relationships were similar to those observed in morphological and “total evidence” analyses, i.e., Euglossini + (Bombini + (Meliponini + Apini)), all of which support a single origin of eusociality.
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