Phylogenetic analysis of 657 base-pair fragments of cytochrome b gene (cyt b). The DNA sequence matrix includes all representatives of the Octodontidae family. Numbers at nodes indicate ML bootstrap (right of the slash) and posterior probability (left of the slash, from a Bayesian analysis); a missing value indicates that the given node has less than 50% of posterior probability. Terminal labels indicate species name and GenBank accession numbers, for further details, see Table SS1.