Best Practices for Justifying Fossil Calibrations
-----------------------------------------------------------------------------------2011/9/21 Systematic Biology
The lack of rigorous protocols for assigning calibrations based on fossils raises serious questions about the credibility of divergence dating results (e.g., Shaul and Graur 2002; Brochu et al. 2004; Graur and Martin 2004; Hedges and Kumar 2004; Reisz and Müller 2004a, 2004b; Theodor 2004; van Tuinen and Hadly 2004a, 2004b; van Tuinen et al. 2004; Benton and Donoghue 2007; Donoghue and Benton 2007; Parham and Irmis 2008; Ksepka 2009; Benton et al. 2009; Heads 2011).
挑选化石校正点，来推断物种分歧时间。化石校正点如何挑选的，我真的是不懂，所以就来读读文章了。
We do not deny that a posteriori methods are a useful means of evaluating calibrations, but there can be no substitute for a priori assessment of the veracity of paleontological data.
posteriori 和 priori是什么意思
We likewise encourage biologists relying on nonfossil calibrations for molecular divergence estimates (e.g., ages of island or mountain range formations, continental drift, and biomarkers) to develop their own set of rigorous guidelines so that their calibrations may also be evaluated in a systematic way.
还可以不通过化石，通过岛或者山的形成时间，板块漂移，生物标志物。（太深奥了，感觉自己像白痴）
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