Characters: Colonies are solid encrusting plates sometimes over one metre diameter. Plates are covered by corallites of irregular sizes and shapes, sometimes with a tendency to form short branchlets. Axial, incipient axial and radial corallites all intergrade and all corallites are smooth and rounded.
Colour: Pale brown, commonly with pink or blue margins.
Similar Species: Isopora cuneata, which has larger, more uniform corallites. See also Acropora minuta. Can readily be mistaken for an Astreopora with small corallites underwater.
Habitat: Shallow reef environments, especially reef flats exposed to strong wave action.
Abundance: Common in Indonesia.
Taxonomic Note: May be difficult to separate from other encrusting Isopora species.
Taxonomic References: Wallace (1999) as Acropora crateriformis; Veron (2000a) as Acropora crateriformis;
Identification Guides: Turak and DeVantier (2011b);