Fossils

Fossil calibrations for the cockroach phylogeny (Insecta, Dictyoptera, Blattodea), comments on the use of wings for their identification, and a redescription of the oldest Blaberidae

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How to date a dragonfly Fossil calibrations for odonates

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The fossil calibration database—a new resource for divergence dating

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Divergence Time Estimation

Divergence Time Estimation, a methodology that combines fossil record and molecular data, is how biologists time travel. But like the fictional time travel the biological time travel is extremely sensitive to parameter choice (including fossils used).I have been studying the local and global effects of fossils using an empirical data set, insect transcriptome phylogeny generated by the 1KITE (One Thousand Insect Transcriptome Evolution) consortium. My work shows that fossil calibrations can have a very strong effect on the estimated age of the node that they calibrate, while the presence of other calibrations throughout the tree might have minimal effect on neighboring nodes in the tree.