The mushroom coral fauna (Scleractinia: Fungiidae) of Brunei Darussalam (South China Sea) and its relation to the Coral Triangle Author Hoeksema, Bert W. Author Lane, David J. W. text Raffles Bulletin of Zoology 2014 2014-08-05 62 566 580 journal article 10.5281/zenodo.5354576 2345-7600 5354576 7B5056EC-50B9-4BFE-9B94-061EA6B285E4 Cycloseris hexagonalis ( Milne Edwards & Haime, 1848 ) Cycloseris hexagonalis – Turak & DeVantier, 2011: 127 . One colour photograph of a live specimen published by Turak & DeVantier (2011) was taken in the Philippines ; the origin of the other one is not mentioned. The identity and origin of a third coral (diameter 6 cm ) showing the aboral side in a black and white photograph is unclear. This specimen shows prominent lower order costae, while C. hexagonalis of that size usually shows a nearly smooth aboral side with costae that are almost invariable in size (Hoeksema, 1989). Because Turak & DeVantier (2011) state that C. hexagonalis may resemble C. tenuis , which has very coarsely ornamented lower order costae, the occurrence of C. hexagonalis at Brunei remains uncertain.