Figure 2: Maximum likelihood phylogeny depicting relationships among 19 Chondrichthyes species inferred from the whole-mtDNA sequences. The 13,749 bp nucleotide alignment (Align_Set_1) was used for the analysis. Numbers on the branches are bootstrap support values. Bold letters indicate the species that were newly sequenced for this study. The Neoselachii subdivisions (Selachii, Batoidea), superorders (Squalomorphi, Galeomorphi) and orders (Hexanchiformes, Squaliformes, Orectolobiformes, Carcharhiniformes, and Lamniformes) are indicated in block letters on the basal branches of the tree. The outgroup species C. monstrosa is in the subclass Holocephali.