Colonies are thin, encrusting or convoluted laminar plates, commonly with ragged margins. A small central corallite may be distinguishable. Peripheral corallites are usually widely spaced. Costae have few if any teeth. Septa and columellae are twisted into a short spiral.
Yellow-brown, usually with pale tops to septa and costae.
Shallow protected reef slopes.
Common in the central Indo-Pacific, uncommon elsewhere.