Characters: Colonies form flat or upright unifacial explanate plates with corallites in long, roughly concentric valleys. Valleys are usually widely (6-7 mm) spaced, flat-bottomed and indistinct. Corallites are small and close together (5-8 per cm) and on the outward facing edge of valley walls (collines). Columellae are well developed.
Colour: Usually dark yellow, green or brown.
Habitat: Shallow reef environments.
Abundance: Uncommon, rare in Brazil.