Ceriantharia (Cnidaria) from Australia, New Zealand and Antarctica with Descriptions of Four New Species Author Stampar, Sérgio N. Laboratório de Evolução e Diversidade Aquática-LEDA, Departamento de Ciências Biológicas, Universidade Estadual Paulista (UNESP), FCL / Assis, Av. Dom Antônio, 2100, 19806 - 900, Assis, SP, Brazil Author Mills, V. Sadie NIWA Invertebrate Collection, National Institute of Water and Atmospheric Research, 301 Evans Bay Parade Hataitai, 6021 Wellington, New Zealand Author Keable, Stephen J. Australian Museum Research Institute, Australian Museum, 1 William Street, Sydney NSW 2010, Australia text Records of the Australian Museum 2020 2020-07-29 72 3 81 100 journal article 10.3853/j.2201-4349.72.2020.1762 2201-4349 4654407 62E3C79A-499F-48DE-AFD9-111D52235D33 Genus Pachycerianthus Roule, 1904 Type species . Pachycerianthus multiplicatus Carlgren, 1912 (see details in Kelly & Keegan, 2000 ). Diagnosis ( sensu Arai, 1965 ). Cerianthidae with second couple of protomesenteries short and sterile. Arrangement of mesenteries in each quartette M,B,m,b (1,3,2,4), more or less distinct. Distribution . This genus is distributed worldwide.