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 Cancellothyridoidea Thomson, 1926
1 Family Cancellothyrididae Thomson, 1926
2 Family Chlidonophoridae Muir-Wood, 1959
3 Family Cnismatocentridae Cooper, 1973
4 Family †Inopinatarculidae Muir-Wood, 1965