Characters: Colonies are generally massive, 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.
Taxonomic Note: A species complex.
Identification Guides: Randall and Myers (1983); Veron (1986a); Sheppard and Sheppard (1991); Nishihira and Veron (1995); Coles (1996); Pillay, Terashima, Venkatasami et al. (2002); Pichon, Benzoni, Chaineau et al. (2010); Turak and DeVantier (2011b);