mtDNA phylogeny of macaques. Maximum likelihood phylogenetic tree derived from a ~835 bp segment of the cytochrome b gene to confirm provenance of cynomolgus macaques in the original Goswami et al.  study. Animals included in the analysis are referenced in Additional file 1: Table S1. Notable macaque clades are highlighted according to previous work on the subject . Animals from Goswami et al.  are highlighted in dark red and fall wholly within the Mauritian cynomolgus macaque group, supporting that they derived from Mauritius.