- This dataset is used as working example in Nabholz, Fuchs and Lanfear. A body-mass corrected molecular rate for bird mitochondrial DNA. - It is originally from Rocha TC, Sequeira F, Aleixo A et al. (2015) Molecular phylogeny and diversification of a widespread Neotropical rainforest bird group: The Buff-throated Woodcreeper complex, Xiphorhynchus guttatus/susurrans (Aves: Dendrocolaptidae). Molecular Phylogenetics and Evolution, 85, 131–140. - Files basem_3rd_codon_position.ctl and baseml_all_position.ctl are control files for BASEML program. - Xipho.tree is the tree file following the results of Rocha et al. 2015. - Xipho_clock_all.tree and Xipho_clock_3rd.tree are the tree files obtaines from BASEML analyses. - Xipho_3rd_codon_position.phy and Xipho_all_position.phy are the alignments of the third-codon positions and all the codon position respectively. - To replicate the molecular dating analysis: 1) Use BASEML to estimate the branch length 2) Extract the tree file from the outfile of BASEML 3) Use the R script applyMassCorrectedRates.R to convert the branch length in divergence dates. applyMassCorrectedRates.R could be edited (for example, using Rstudio) or, alternatively, it could be use in command line as followed: Rscript applyMassCorrectedRates.R 48.6 Name_of_BASEML_Tree_files.tree Note: All the files were generated with linux computer (ubuntu 14.02). Be aware of potential files format problem between operating system.