Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order †Protorthida Schuchert & Cooper, 1931 Superfamily †Protorthoidea Schuchert & Cooper, 1931 Family †Protorthidae Schuchert & Cooper, 1931