Phylogram of the Bayesian consensus tree obtained from COI data set for species of Calomys with emphasis in Calomys tener. The order of the support values in the nodes is as follows: Bayesian posterior probabilities/maximum likelihood bootstrap/maximum parsimony bootstrap. Sequences from GenBank are indicated with their accession number and the species names. In the clade corresponding to C. tener the haplotype letter, the specimen having each haplotype and the sampling locality is indicated.