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 Mesozoanthus Sinniger & Haeussermann , 2009 Mesozoanthus Sinniger & Haeussermann , 2009: 31, 32. Type species. Mesozoanthus fossii Sinniger & Haeussermann , 2009, by original designation and monotypy. Gender. Masculine. Diagnosis. "Macrocnemic with Parazoanthus -like growth-form. Well-developed polyps with long and pointed tentacles; polyps form clusters linked by a basal coenenchyme. DNA sequences significantly differ from those in other genera..." and "In contrast to Parazoanthus , members of Mesozoanthus usually occur in small patches and are not known to colonise demosponges. No symbioses with Symbiodinium zooxanthellae." ( Sinniger and Haeussermann 2009 : 32). Remarks. Only two species of this genus are known, from temperate waters along the west coast of the Americas.