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Citation for Study 10365

About Citation title: "Angiosperm diversification through time.".
About Study name: "Angiosperm diversification through time.".
About This study is part of submission 10355 (Status: Published).

Citation

Magall?n S., & Castillo A. 2009. Angiosperm diversification through time. American Journal of Botany, 96(1): 349-365.

Authors

  • Magall?n S. Phone 5255-5622-9087
  • Castillo A.

Abstract

The extraordinary diversity of angiosperms is the ultimate outcome of the interplay of speciation and extinction, which determine the net diversification of different lineages. We document the temporal trends of angiosperm diversification rates during their early history. Absolute diversification rates were estimated for order-level clades using ages derived from relaxed molecular clock analyses that included or excluded a maximal constraint to angiosperm age. Diversification rates for angiosperms as a whole ranged from 0.0781 to 0.0909 net speciation events per million years, with dates from the constrained analysis. Diversification through time plots show an inverse relationship between clade age and rate, where the younger clades tend to have the highest rates. Angiosperm diversity is found to have mixed origins: slightly less than half of the living species belong to lineages with low to moderate diversification rates, which appeared between 130 and 102 Mya (Barremian-uppermost Albian; Lower Cretaceous). Slightly over half of the living species belong to lineages with moderate to high diversification rates, which appeared between 102 and 77 Mya (Cenomanian-mid Campanian; Upper Cretaceous). Terminal lineages leading to living angiosperm species, however, may have originated soon or long after the phylogenetic differentiation of the clade to which they belong.

Keywords

crown group; diversification; extinction; fossils; molecular clock: penalized likelihood; stem group

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S10365
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