Characters: Colonies are encrusting and usually small. Corallites are cerioid, with irregular angular shapes. A central corallite is often conspicuous. Septa are compact and columellae are small. Colonies are not fleshy.
Colour: Usually pale grey, brown or rust coloured, often mottled.
Similar Species: Sometimes superficially resembles small colonies of Moseleya latistellata. If a central corallite is inconspicuous it resembles Favites. See also Acanthastrea hemprichii and A. rotundoflora.
Habitat: Lower reef slopes protected from wave action.
Abundance: Rare except in subtropical localities of eastern Australia.