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A Southern Hemisphere Origin For Campanulid Angiosperms, With Traces Of The Break-Up Of Gondwana, Jeremy M. Beaulieu, David C. Tank, Michael J. Donoghue
A Southern Hemisphere Origin For Campanulid Angiosperms, With Traces Of The Break-Up Of Gondwana, Jeremy M. Beaulieu, David C. Tank, Michael J. Donoghue
Faculty Publications and Other Works -- Mathematics
Background
New powerful biogeographic methods have focused attention on long-standing hypotheses regarding the influence of the break-up of Gondwana on the biogeography of Southern Hemisphere plant groups. Studies to date have often concluded that these groups are too young to have been influenced by these ancient continental movements. Here we examine a much larger and older angiosperm clade, the Campanulidae, and infer its biogeographic history by combining Bayesian divergence time information with a likelihood-based biogeographic model focused on the Gondwanan landmasses.
Results
Our analyses imply that campanulids likely originated in the middle Albian (~105 Ma), and that a substantial portion …