Yamasaki, H. “Two New Species of Dracoderes (Kinorhyncha: Dracoderidae) from the Ryukyu Islands, Japan, With a Molecular Phylogeny of the Genus”. Zootaxa, vol. 3980, no. 3, June 2015, pp. 359–378, doi:10.11646/zootaxa.3980.3.2.