Are rates of species diversification correlated with rates of morphological evolution?
2009/05/13 by Dean C. Adams, Chelsea M. Berns, Kenneth H. Kozak +1 · 43 citations
Earth and Planetary Sciences · Biochemistry, Genetics and Molecular Biology · Environmental Science · #Evolution and Paleontology Studies #Genetic diversity and population structure #Animal Ecology and Behavior Studies
paper · doi:10.1098/rspb.2009.0543
Abstract
Some major evolutionary theories predict a relationship between rates of proliferation of new species (species diversification) and rates of morphological divergence between them. However, this relationship has not been rigorously tested using phylogeny-based approaches. Here, we test this relationship with morphological and phylogenetic data from 190 species of plethodontid salamanders. Surprisingly, we find that rates of species diversification and morphological evolution are not significantly correlated, such that rapid diversification can occur with little morphological change, and vice versa. We also find that most clades have undergone remarkably similar patterns of morphological evolution (despite extensive sympatry) and that those relatively novel phenotypes are not associated with rapid diversification. Finally, we find a strong relationship between rates of size and shape evolution, which has not been previously tested.
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