Hymenoptera: Colletidae): Emerging Patterns from the Southern End of the World Eduardo A
Journal of Biogeography (J. Biogeogr.) (2011) ORIGINAL Biogeography and diversification of ARTICLE colletid bees (Hymenoptera: Colletidae): emerging patterns from the southern end of the world Eduardo A. B. Almeida1,2*, Marcio R. Pie3, Sea´n G. Brady4 and Bryan N. Danforth2 1Departamento de Biologia, Faculdade de ABSTRACT Filosofia, Cieˆncias e Letras, Universidade de Aim The evolutionary history of bees is presumed to extend back in time to the Sa˜o Paulo, Ribeira˜o Preto, SP 14040-901, Brazil, 2Department of Entomology, Comstock Early Cretaceous. Among all major clades of bees, Colletidae has been a prime Hall, Cornell University, Ithaca, NY 14853, example of an ancient group whose Gondwanan origin probably precedes the USA, 3Departamento de Zoologia, complete break-up of Africa, Antarctica, Australia and South America, because Universidade Federal do Parana´, Curitiba, PR modern lineages of this family occur primarily in southern continents. In this paper, 81531-990, Brazil, 4Department of we aim to study the temporal and spatial diversification of colletid bees to better Entomology, National Museum of Natural understand the processes that have resulted in the present southern disjunctions. History, Smithsonian Institution, Washington, Location Southern continents. DC 20560, USA Methods We assembled a dataset comprising four nuclear genes of a broad sample of Colletidae. We used Bayesian inference analyses to estimate the phylogenetic tree topology and divergence times. Biogeographical relationships were investigated using event-based analytical methods: a Bayesian approach to dispersal–vicariance analysis, a likelihood-based dispersal–extinction– cladogenesis model and a Bayesian model. We also used lineage through time analyses to explore the tempo of radiations of Colletidae and their context in the biogeographical history of these bees.
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