Discinoidea is a superfamily of Discinid brachiopods. For discussion of Discinid taxonomy, see Discinidae. The history of the superfamily Discinoidea spans almost the entire Phanerozoic Eon, and has been described as â³one of the few â²living fossilsâ² that has survived all major catastrophic events in the Phanerozoic history of the Earth.â³