Two complete mitochondrial genomes of and (Characiforme: Serrasalmidae).

and are two compressed-bodied ornamental fishes of Serrasalmidae family. In this study, complete mitochondrial genome sequences of the two species were determined. The mitogenomes were 16662 bp and 16737 bp nucleotides in length, and both contained 13 protein-coding genes (PCGs), 22 transfer RNAs (tRNA), 2 ribosomal RNAs (rRNA) and a control region. The phylogenetic tree revealed that was closely related to and while was related to , and then the two clades clustered into one group. Present mitogenome sequences of and will provide molecular information to the evolution and ecology studies of the two species.