Cycad diversification and tropical biodiversity
DOI:
https://doi.org/10.3989/collectbot.2012.v31.008Keywords:
climatic change, Cycadales, latitudinal diversity gradients, paleobiogeography, speciation timingAbstract
The recent unexpected discovery that living Cycadales are not Jurassic-Cretaceous (200– 65 Mya) relicts, as all their extant genera began to diversify during the Late Miocene (12 Mya), has challenged a classical evolutionary myth. This brief note shows how this finding may also provide new clues on the shaping of the high tropical biodiversity
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