Deltocyathus rotulus (Alcock, 1898) Trochocyathus rotulus Alcock, 1898: 16, pl. 2, figs. 1, 1a. Deltocyathus rotulus.– Cairns, 1994: 55–56, pl. 24, figs. j,k (description, synonymy).–Cairns & Zibrowius, 1997: 125–126, figs. 16a–c (remarks, key); 1999a: 91–92 (remarks). New records. SEAMOUNTS: Franklin 05/89/14 (Gascoyne), 1, AM G16733. — QUEENSLAND: Cidaris I 1-2, 33, MTQ G55618; Cidaris I 1- 3, 8, MTQ G55619 and G55620; Cidaris I 5-2, 14, MTQ G55639; Cidaris I 9-2, 20, MTQ G55622; Cidaris I 20-2, 10, MTQ G55625; Cidaris I 24- 3, 10, MTQ G55626. Types. The holotype is presumed to be deposited at the Indian Museum, Calcutta, but was not examined. Type Locality: off North Maldive Atoll, 1408–1756 m.

Published as part of Cairns, S. D., 2004, The Azooxanthellate Scleractinia (Coelenterata: Anthozoa) of Australia, pp. 259-329 in Records of the Australian Museum 56 on page 280