Widespread reticulate evolution in an adaptive radiation

Dylan DeBaun, Nirhy Rabibisoa, Achille Raselimanana, Christopher John Raxworthy & Frank T. Burbrink
A fundamental assumption of evolutionary biology is that phylogeny follows a bifurcating process. However, hybrid speciation and introgression are becoming more widely documented in many groups. Hybrid inference studies have been historically limited to small sets of taxa, while exploration of the prevalence and trends of reticulation at deep time scales remains unexplored. We study the evolutionary history of an adaptive radiation of 109 gemsnakes in Madagascar (Pseudoxyrhophiinae) to identify potential instances of introgression. Using...
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