The complete mitochondrial genome and phylogenetic analysis of Acaudina molpdioides

The sea potato (Acaudina molpadioides) is a species of sea cucumber of the family Holothuroidea under Phylum Echinodermata. In this study, we firstly sequenced and annotated the complete mitochondrial genome of A. molpadioides, which was 16,028 bps in size and contained 13 protein-coding genes, 2 rRNAs, 19 tRNA genes, and 1 putative control region. The overall A + T content (65.47%) was higher than G + C content (34.53%), showing the AT bias, consistently with other invertebrate mitochondrial genomes. Phylogenetic analyses showed that the mitochondrial DNAs of A. molpadioides were closely related to other species of Holothuroidea.