Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order Terebratulida Waagen, 1883 Suborder Terebratulidina Waagen, 1883 Superfamily Terebratuloidea Gray, 1840 Family †Gibbithyrididae Muir-Wood, 1965