Geographical range and speciation in fossil and living molluscs.

  title={Geographical range and speciation in fossil and living molluscs.},
  author={David Jablonski and Kaustuv Datta Deepak Kar Debarati Roy},
  journal={Proceedings. Biological sciences},
  volume={270 1513},
The notion of a positive relation between geographical range and speciation rate or speciation probability may go back to Darwin, but a negative relation between these parameters is equally plausible. Here, we test these alternatives in fossil and living molluscan taxa. Late Cretaceous gastropod genera exhibit a strong negative relation between the geographical ranges of constituent species and speciation rate per species per million years; this result is robust to sampling biases against small… CONTINUE READING
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