*BEAST 'four-species' model input file

Input data file in XML format used in *BEAST (multispecies coalescent) species tree analysis of the reduced-cytb dataset in BEAST v1.8.3 under a 'four-species' model grouping sequences into the corresponding three currently recognized species of Amatitlania, as well as A. nigrofasciata samples from Lago Coatepeque formerly known as 'A. coatepeque'. The final section of this file calls a post-run analysis estimating the log-marginal likelihood of the model using path sampling (PS) and stepping-stone (SS) sampling approaches