Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Linguliformea Williams et al., 1996 Class Lingulata Gorjansky & Popov, 1985 Order Lingulida Waagen, 1885 1 Superfamily Linguloidea Menke, 1828 2 Superfamily Discinoidea Gray, 1840 3 Superfamily †Acrotheloidea Walcott, 1908