Rugose corals have well-developed septa, tabulae, and dissepiments. Both solitary and colonial forms are common. Solitary Rugosa ("horn corals") are often shaped like a horn. Colonial Rugosa range from isolated corallites connected by lateral tubes to compact honeycomb-like masses.
Rugose corals range from the Ordovician to Permian and
were extremely diverse and abundant. They prefer warm, clear, shallow water,
and many were important reef builders.
Last updated on February 24, 1997-jlc.