Commentaire : Each coral with usually one, centrally located mouth (monostomatous). Discoidal, shape varies from flat to highly arched. The specimens vary in thickness. The length of the central fossa is 1/10 to 1/3 of the coral length. Maximum length of the coralla up to 20 cm. The septa are tightly packed and usually straight. Most specimens have a tentacular lobe above the inner edge of each septum. Septa become wavy after the development of a tentacular lobe on the adjacent septa of higher orders. The lower order septa are thicker and more exsert than those of higher orders. The septal margins are ornamented with fine, irregularly granular dentations. The corallum wall is usually perforated,not granulated, in adult specimens. The costae are usually of equal thickness. The costae are straight and distinct near the corallum margin, but less prominent and wavy near the centre. All costae are finely ornamented with blunt, granulate spines.
Protection : basse