Characters: Colonies are submassive or encrusting. Corallites are 4-7 millimetres diameter and are thick walled with prominent skeletal structures. Costae are strongly beaded. The coenosteum is densely covered with thick, finely elaborated spinules.
Colour: Mustard, green, brown or purple, often with pale septo-costae.
Habitat: Shallow reef environments.
Abundance: Sometimes common in the western Indian Ocean, rare elsewhere.