The order Zoantharia Rafinesque, 1815 (Cnidaria, Anthozoa: Hexacorallia): supraspecific classification and nomenclature Author Low, Martyn E. Y. Lee Kong Chian Museum of Natural History, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore & former address: Department of Marine and Environmental Sciences, Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903 - 0213, Japan Author Sinniger, Frederic Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa 905 - 0227, Japan Author Reimer, James Davis Molecular Invertebrate Systematics and Ecology (MISE) Laboratory, Department of Marine and Environmental Sciences, Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903 - 0213, Japan; and Tropical Biosphere Research Center, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903 - 0213, Japan jreimer@sci.u-ryukyu.ac.jp text ZooKeys 2016 2016-12-14 641 1 80 http://dx.doi.org/10.3897/zookeys.641.10346 journal article http://dx.doi.org/10.3897/zookeys.641.10346 1313-2970-641-1 903D6413C8024864A662D71C50740E2D BB707A65FFDFFFFBFFFE8B61FFD5FF91 579464 Corallizoanthus Reimer, in Reimer, Nonaka, Sinniger & Iwase, 2008 Corallizoanthus Reimer, in Reimer, Nonaka, Sinniger & Iwase, 2008: 940. Type species. Corallizoanthus tsukaharai Reimer, in Reimer, Nonaka, Sinniger & Iwase, 2008, by monotypy. Gender. Masculine. Diagnosis. Characterised by its association with living precious corals ( Alcyonacea : Coralliidae ), and unlike the gorgonian-associated genus Savalia , does not secrete its own scleroproteinous axis. Additionally, polyps are primarily but not always unitary (solitary; non-colonial) (see Reimer et al. 2008a : 940). Encrustations to center of mesoglea, sphincter muscle is cyclically transitional ( Swain and Swain 2014 , Swain et al. 2015 ). Remarks. A monospecific genus thus far only reported from the Ryukyu Islands, Japan.