Complete mitochondrial genome analysis of Sakuraeolis japonica (Baba, 1937) (Mollusca, Gastropoda, Nudibranchia)

In this study, a complete mitochondrial genome of a nudibranch species, Sakuraeolis japonica was sequenced and analyzed. The mitochondrial genome size is 15,059 bp with 28.1% A, 14.9% C, 19.3% G, and 37.7% T nucleotide distributions. This is the eighth record for complete mitochondrial genome of the Nudibranchia and first record for the genus. Furthermore, phylogenetic relationship of S. Japonica in the Nudibranchia was investigated by using protein-coding genes of complete mitochondrial genome. The present study suggests that S. japonica belongs to the family Facelinidae and it is placed in monophyletic Nudibranchia. The closest species to S. japonica are Chromodoris magnifica and Chromodoris quadricolor that belong to the family Chromodorididae.