Reference

Denis Lynn, M. Strüder-Kypke (2005): Scuticoliate endosymbionts of echinoids (phylum echinodermata): phylogenetic relationships among species in the genera Entodiscus, Plagiopyliella, Thyrophylax, and Entorhipidium (phylum ciliophora) – J. Parasitol. – 91: 1190 - 1199.