831 species

Cycloseris costulata

(Ortmann, 1889)


Milne Edwards and Haime, 1849

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.

COTW History since Veron (2000a)
  • Family: All families are currently under review
  • Genus/species: No change