Characters: Colonies are massive with short, highly contorted valleys. Septa have well developed teeth. There are no columellae.
Colour: Yellowish-green.
Similar Species: Superficially resembles Platygyra contorta and Montigyra kenti.
Habitat: Shallow reef backs.
Abundance: Extremely rare.
Taxonomic Note: Type species of Boninastrea Yabe and Sugiyama, 1935. Very distinct species, but it is little known. Concerted efforts to find it in the Coral Triangle have not been successful.
Taxonomic References: Best and Suharsono (1991); Veron (2000a); Huang, Benzoni, Fukami et al. (2014);
Identification Guides: Nishihira and Veron (1995);
