Co-phylogram plot showing relationships of the genera Eupentacta and Sclerodactyla, with related holothurians, as inferred from a phylogenetic analysis of the COI (left) and 16S rRNA (right) gene sequences. The trees were rooted at a midpoint. The numerals at the nodes are nonparametric bootstrap test (NJ, ML) and a posteriori probability (BI, %) values (the order is NJ/ML/BI). The dotted line connects the identifiers of the sequences from the same specimen. The sequences obtained in the present study are indicated with bold letters. The scale on the left and right bottom shows the relative length of branches in two gene trees.