Abstract

Molecular phylogenetic studies are making increasing use of partitioned Bayesian analyses via software tools like MrBayes, version 3 (Ronquist and Huelsenbeck, 2003). Data partitioning is important because, as long as the same topology/history underlies all of the parti-tions, it addresses some of the problems associated with the combination of data sets with heterogeneous rates (Bull et al., 1993) and eliminates the need to argue the validity of tests that have been used to judge data com-binability (e.g., Huelsenbeck et al., 1994; Huelsenbeck