Phylogenetic reconstructions of Altrichthys species based on mitochondrial control region (313 aligned base pairs) and cytochrome oxydase 1 (CO1, 611 aligned base pairs). The closely related Acanthochromis polyacanthus was used as an outgroup. Sample labels refer to collection sites: BUS, El Rio y Mar Resort, Busuanga Island, COR, Balinsasayaw Resort, Uson Island; SAN, Sangat Island; DLR, Dive Link Resort, Uson Island. Numbers above nodes refer to percent of 1000 bootstrap replicates used in Neighbor-Joining (left) and Maximum Likelihood (right) reconstruction methods.