What is "stylophora"

The stylophorans are an extinct, possibly polyphyletic group allied to the Paleozoic Era echinoderms, comprising the prehistoric cornutes and mitrates. It is synonymous with the subphylum Calcichordata.

Stylophora is a genus of colonial stony corals in the family Pocilloporidae. They are commonly known as cat's paw corals or birdsnest corals. They are native to the Red Sea, the Indo-Pacific region and eastwards as far as the Pitcairn Islands.