Commentaire : Corallum free-living. Each coral with usually one, centrally located mouth (monostomatous). Outline from discoidal to slightly oval and from flat to slightly arched. Thickness variable. The length of the central fossa, measured at its bottom, is 1/10 to 1/5 of the corallum length. Maximum length of the coralla up to 25 cm. The septa are densely packed and straight. The septa of lower orders are thick, whereas those of higher orders are thin. The lower order septa are more exsert than those of higher orders. The septal margins are coarsely ornamented with angular dentations. Their number varies from 5 to 23 per cm. The corallum wall is not granulated and perforated in adult specimens. The costae are unequal, straight and distinct near the corallum margin, while they are less distinct and sometimes wavy near the centre. All costae are coarsely ornamented. The costal spines are usually club-shaped, blunt and granular at the tips, but sometimes elongate and branched with sharp points in various directions. Their number varies from 12 to 18 per cm.
Protection : basse