国际年代地层时间
国际地层委员会
https://stratigraphy.org/chart
国际年代地层图202306
https://stratigraphy.org/ICSchart/ChronostratChart2023-06.pdf
时间标记参考
paleobiodb搜索
https://paleobiodb.org/#/
PBDB Navigator - Paleobiology Database古生物学数据库
https://paleobiodb.org/
Timetree分类单元时间估计
http://timetree.org/
分歧时间估计软件
mcmctree in PAML
Phylogenetic Analysis by Maximum Likelihood (PAML)
http://abacus.gene.ucl.ac.uk/software/paml.html
MCMCtree tutorials
http://abacus.gene.ucl.ac.uk/software/MCMCtree.Tutorials.pdf
An earlier step-by-step manual for MCMCtree with an example dataset
http://abacus.gene.ucl.ac.uk/software/MCMCtreeStepByStepManual.pdf
BEAST v1.10.4
http://beast.community/
稳定，但是设置保存太麻烦了
BEAST 2 is version 2.7.5
https://www.beast2.org/
设置保存更简单，但是不同小版本之间也不兼容，
