Molecular phylogenetic re-evaluation of deep-sea holothuroid genus Pannychia based on COI gene and genome-wide SNPs data

Pannychia is one of the common holothuroid genera at the bathyal seafloor in the Pacific Ocean, whose taxonomy was revised to six valid species in the last decade. However, the actual species diversity of Pannychia is still unclear and requires global revision. Here we propose a dataset of Pannychia based on the combined results of two different kinds of molecular phylogenetic methods, DNA barcoding of the partial cytochrome c oxidase subunit I (COI) gene and a genome-wide single-nucleotide polymorphisms (SNPs). We examined 178 individuals of Pannychia collected from the North and South Pacific, Indian and Southern waters from 1986 to 2019.