Characters: Colonies are massive to encrusting, and meandroid or submeandroid, with thick walls. Septa are exsert and have a characteristically ragged appearance. Columellae are weakly developed and centres are indistinct.
Colour: Commonly brightly coloured, usually with brown walls and grey or green valleys.
Similar species: Platygyra lamellina, which has thicker walls and neat rounded septa.
Habitat: Most reef environments, especially back reef margins.
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