 Fossils of "Cothurnocystis" species have been found in Nevada, Scotland, Czech Republic, France and Morocco.The position of the Stylophora, of which "Cothurnocystis" is a prominent representative, has been in a state of flux.Some scientists claim to be able to see a structurally very basic notochord in the tail, and consequently consider the Stylophora to be a group of primitive chordates, calling them the "Calcichordata".