The Emergence of Earliest Angiosperms may be Earlier than Fossil Evidence Indicates.

ABSTRACT: Gaps between molecular ages and fossils undermine the validity of time-calibrated molecular phylogenies. An example of the time gap surrounds the age of angiosperm's origin. We calculate molecular ages of the earliest flowering plant lineages using 22 fossil calibrations (101 genera, 40 families). Our results reveal the origin of angiosperms at the late Permian, ~275 million years ago. Different prior probability curves of molecular age calculations on dense calibration point distributions had little effect on overall age estimates compared to the effects of altered calibration points. The same is true for reasonable root age constraints. We conclude that our age estimates based on multiple datasets, priors, and calibration points are robust and the true ages are likely between our extreme

SUBMITTER: Salomo K 

PROVIDER: S-EPMC5792071 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature