Stylasteridae

Stylasteridae, also known as lace corals, is a family of colonial hydrozoans with a calcified skeleton. They first appeared 65 million years ago in deep waters. About 10% of the species have adapted to shallow water. In shallow reefs they can grow up to 25 cm tall × 30 cm wide, but some species in deeper waters can reach 1 meter.

Genera
According to the World Register of Marine Species, the following genera belong to this family:
 * Adelopora Cairns, 1982
 * Astya Stechow, 1921d
 * Axoporella †
 * Calyptopora Boschma, 1968
 * Cheiloporidion Cairns, 1983
 * Congregopora Nielsen, 1919 †
 * Conopora Moseley, 1879
 * Crypthelia Milne Edwards & Haime, 1849
 * Cyclohelia Cairns, 1991
 * Distichopora Lamarck, 1816
 * Errina Gray, 1835
 * Errinopora Fisher, 1938
 * Errinopsis Broch, 1951
 * Gyropora Boschma, 1960
 * Inferiolabiata Broch, 1951
 * Lepidopora Pourtalès, 1871
 * Lepidotheca Cairns, 1983
 * Leptohelia Lindner, Cairns & Zibrowius, 2014
 * Paraerrina Broch, 1942
 * Phalangopora Kirkpatrick, 1887
 * Pliobothrus Pourtalès, 1868
 * Pseudocrypthelia Cairns, 1983
 * Sporadopora Moseley, 1879
 * Stellapora Cairns, 1983
 * Stenohelia Kent, 1870
 * Stephanohelia Cairns, 1991
 * Stylantheca Fischer, 1931
 * Stylaster Gray, 1831
 * Systemapora Cairns, 1991