The complete mitochondrial genome of Pseudocolochirus violaceus (Cucumariidae, Dendrochirotida).

The complete mitochondrial genome of Pseudocolochirus violaceus was obtained and described in this study. This complete mitochondrial genome is 15,752 bp in length and consists of 13 protein-coding genes, 2 ribosomal RNA genes, and 22 transfer RNA genes. Except ND6 and 5 tRNAs, the others were encoded by the heavy strand. The overall base composition of the heavy-strand was 38.65% A, 12.09% G, 24.31% C, and 24.95% T, with a high A + T content of 63.6%. The phylogenetic analysis suggested that P. violaceus was closest to Cucumaria miniata. The newly described mitochondrial genome may provide valuable data for phylogenetic analysis for Holothuroidea.