Characters: Colonies are thin, flat, encrusting laminae with widely spaced irregular corallites. A central corallite may be distinguishable. Most corallites are shallow, elliptical and concentrically arranged or irregular. Costae are exsert, equal, smooth and have a toothed lobe where they commence. There are perforations between the costae and the coenosteum is finely ridged. Columellae are small.
Colour: Green or cream with pale costae.
Habitat: Protected turbid reef environments, especially on steeply sloping surfaces.