Complete mitochondrial genome of the earthworm, Amynthas jiriensis (Clitellata: Megascolecidae).

To date, a very limited number of complete clitellate mitochondrial genome (mitogenome) sequences are available. Therefore, in the present study, we elucidated the complete mitogenome sequence of Amynthas jiriensis (Clitellata: Megascolecidae), a species endemic to South Korea. Its 15 151-bp-long genome contains the 37 genes typical of metazoan mitogenomes [13 protein-coding genes (PCG), 2 rRNA genes, and 22 tRNA genes], and one major non-coding control region. All 37 genes were transcribed from the same DNA strand. The arrangement of the A. jiriensis mitogenome is identical to those of all available clitellate mitogenomes. All the 13 PCGs start with the ATG codon. Five PCGs (COI, ND6, CytB, ATP6, and ND4L) end with TAA, and COII ends with TAG, whereas the remaining PCGs end with the incomplete stop codon. The phylogenetic analysis using 13 PCGs has shown the species of Pheretimoid genera, including A. jiriensis, formed a complexity.