The fossil record of spiders revisited: implications for calibrating trees and evidence for a major faunal turnover since the Mesozoic

  title={The fossil record of spiders revisited: implications for calibrating trees and evidence for a major faunal turnover since the Mesozoic},
  author={Ivan L. F. Magalh{\~a}es and Guilherme H F Azevedo and Peter Michalik and Mart{\'i}n J. Ram{\'i}rez},
  journal={Biological Reviews},
Studies in evolutionary biology and biogeography increasingly rely on the estimation of dated phylogenetic trees using molecular clocks. In turn, the calibration of such clocks is critically dependent on external evidence (i.e. fossils) anchoring the ages of particular nodes to known absolute ages. In recent years, a plethora of new fossil spiders, especially from the Mesozoic, have been described, while the number of studies presenting dated spider phylogenies based on fossil calibrations… 
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