Schematic representation of the mt genome of B. orientalis. Symbol … and ()in the sequence indicates nucleotide omitted. Primer sequences of P1, P2, P3, P4, R1, R2, R3 and R4 are shown in light grey. Three protein-coding genes cox 1, cox 3 and cob are shown in dark grey. The first and last six codons of each protein-coding gene are shown below the sequence. Six LSU rRNA genes from L1–L6 are showed. Terminal inverted repeats (TIR) are represented by underlining. The symbol I above the genome sequence indicates the beginning and the end of the gene fragment. The nucleotide position of each gene fragment is shown above the sequences.