Paleontological Evidence to Date the Tree of Life

Paleontological Evidence to Date the Tree of Life

The role of fossils in dating the tree of life has been misunderstood. Fossils can provide good "minimum" age estimates for branches in the tree, but "maximum" constraints on those ages are poorer. Current debates about which are the "best" fossil dates for calibration...

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Veröffentlicht in:Molecular biology and evolution 2007-01, Vol.24 (1), p.26-53
Hauptverfasser: Benton, Michael J., Donoghue, Philip C. J.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Biological Evolution
Chronology as Topic
Evolution, Molecular
Fossils
Humans
Paleontology
Phylogeny
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creator Benton, Michael J.
Donoghue, Philip C. J.
description The role of fossils in dating the tree of life has been misunderstood. Fossils can provide good "minimum" age estimates for branches in the tree, but "maximum" constraints on those ages are poorer. Current debates about which are the "best" fossil dates for calibration move to consideration of the most appropriate constraints on the ages of tree nodes. Because fossil-based dates are constraints, and because molecular evolution is not perfectly clock-like, analysts should use more rather than fewer dates, but there has to be a balance between many genes and few dates versus many dates and few genes. We provide "hard" minimum and "soft" maximum age constraints for 30 divergences among key genome model organisms; these should contribute to better understanding of the dating of the animal tree of life.
doi_str_mv 10.1093/molbev/msl150
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subjects Animals
Biological Evolution
Chronology as Topic
Evolution, Molecular
Fossils
Humans
Paleontology
Phylogeny
title Paleontological Evidence to Date the Tree of Life
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