Characters: Colonies are usually dome-shaped and phaceloid, with widely spaced tubular corallites. Septa are evenly spaced, in two alternating orders. Primary septa are exsert. Costae are well developed. Tentacles are extended at night and are of two sizes, those corresponding with primary septa having broad bases.
Colour: Yellow-brown to grey.
Similar Species: Skeletons have similarities with phaceloid Euphyllia.
Habitat: Protected reef environments.
Abundance: Usually uncommon but conspicuous.
Taxonomic Note: Very distinct species.