Characters: Polyps are circular, helmet-shaped and up to 80 millimetres diameter, with a concave undersurface. Primary septa are thick and exsert around the mouth.
Colour: Pale cream or brown, sometimes with violet margins.
Similar Species: Cycloseris tenuis. Cycloseris cyclolites is more strongly dome-shaped and septa around the mouth are less exsert. See also C. erosa and Fungia granulosa which are larger and thicker.
Habitat: Soft inter-reef substrates and lower reef slopes protected from wave action.
Abundance: Rare.
Taxonomic Note: Poorly differentiated from other species of Cycloseris.
Taxonomic References: Veron and Pichon (1980); Hoeksema (1989a) as Fungia costulata; Veron (2000a); Hoeksema (2014);
Identification Guides: Sheppard and Sheppard (1991); Nishihira and Veron (1995); Turak and DeVantier (2011b);
