Marine Life of Hawai'i
Glossary of Technical Terms
CALYX (plural, CALICES): depression that houses the polyp
COENOSTEUM: common surface of corallum between calices
COLUMELLA: central structure of the calyx formed by fusion of the septa
CORALLUM (plural, CORALLA): skeleton of entire coral colony
CORALLITE: skeleton produced by an individual polyp
COSTA (plural, COSTAE): extensions of the septa outside the calyx unto the coenosteum
PAPILLAE: rounded nipple-like projections covering the coenosteum; found in Montipora
THECA: wall of corallite
SEPTUM (plural, SEPTA): : skeletal plates that project into the calyx from the theca; may be subdivide into primary, secondary, and tertiary septa
VERRUCAE: small cylindrical projections arising from the corallum that contain calices; found in Pocillopora
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