Detect file format of taxon fileSource:
Detect file format of the total taxon list (molecular, morphological, and stratigraphic) and maximum age of fossil, see RevBayes total -evidence fossil file for an example of this.
A data frame with one column containing the taxon name of tips in phylogenetic tree. Optionally, a second column can indicate the maximum age of the tip. If the tip is extant, use 0.0 as the age. Can be CSV or TSV.