Colonies are encrusting and usually small. Corallites are cerioid, with irregular angular shapes. A central corallite is usually conspicuous. Septa are compact and columellae are small. Colonies are not fleshy. Colour: Usually pale grey, brown or rust coloured, often mottled. Similar species: Superficially resembles small colonies of the faviid Moseleya?latistellata. If a central corallite is inconspicuous it resembles the faviid 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.