Characters: Colonies are massive with slightly angular corallites. Corallites have thick, rounded walls. Paliform lobes are weakly developed. Columellae are large. Septal spines may be prominent. Costae commonly form a three pointed star where three corallites adjoin.
Colour: Usually brown, sometimes with green or grey oral discs.
Habitat: Most reef environments.
Abundance: Sometimes common.
Identification Guides: Veron (1986a); Sheppard and Sheppard (1991); Nishihira and Veron (1995); Pillay, Terashima, Venkatasami et al. (2002); Chan, Choi, McCorry et al. (2005); Pichon, Benzoni, Chaineau et al. (2010); Turak and DeVantier (2011b);