Complete mitochondrial genome sequence of the giant mud worm Paraleonnates uschakovi Khlebovich & Wu, 1962 (Polychaeta: Nereididae).

Complete mitochondrial genome sequence of the giant mud worm Paraleonnates uschakovi (Polychaeta: Nereididae) was determined in this study for the first time. The mitogenome of P. uschakovi is 15,540 bp in length. It has 13 protein-coding genes, two rRNA genes, 22 tRNA genes and a non-coding region. Mitogenome analysis of P. uschakovi showed inversion in the positions of three tRNAs compared to the mitogenome sequences of Perinereis aibuhitensis, P. nuntia and Platynereis dumerilii. The phylogenetic position of P. uschakovi compared to 15 selected polychaetes was investigated. P. uschakovi was grouped into the family of Nereididae. It is closely related to the clade containing Tylorrhynchus heterochaetus and Namalycastis abiuma.