Azooxanthellate Scleractinia (Cnidaria, Anthozoa) from South Africa Filander, Zoleka N. Kitahara, Marcelo V. Cairns, Stephen D. Sink, Kerry J. Lombard, Amanda T. ZooKeys 2021 2021-10-28 1066 1 198 Wells, 1935 Wells 1935 Anthozoa Turbinoliidae Sphenotrochus CoL Animalia Sphenotrochus (Eusthenotrochus) Scleractinia 0 1 Cnidaria subGenus Eusthenotrochus  Diagnosis.   Sphenotrochusin which the costae are each composed of two or more irregular rows of short narrow ridges.