No link between population isolation and speciation rate in squamate reptiles

Sonal Singhal, Guarino Colli, Maggie Grundler, Gabriel Costa, Ivan Prates & Daniel Rabosky
Rates of species formation vary widely across the tree of life and contribute to massive disparities in species richness among clades. This variation can emerge from differences in metapopulation-level processes that affect the rates at which lineages diverge, persist, and evolve reproductive barriers and ecological differentiation. For example, populations that evolve reproductive barriers quickly should form new species at faster rates than populations that acquire reproductive barriers more slowly. This expectation implicitly links microevolutionary processes...
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