Rhizosmilia Cairns, 1978

Diagnosis.

Colonies formed by extra-tentacular budding from a common basal coenosteum. Corallite base increase in diameter by adding exothecal dissepiments over raised costae producing concentric rings of partitioned chambers that resemble polycyclic development. Septotheca costate and granular. Septal axial margins smooth. Paliform lobes occur before penultimate septal cycle. Columella papillose or lamellar. Vesicular endotheca present.

Type species.

Rhizosmilia gerdae Cairns, 1978, by original designation.