Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order †Pentamerida Schuchert & Cooper, 1931 Suborder †Pentameridina Schuchert & Cooper, 1931 Superfamily †Stricklandioidea Schuchert & Cooper, 1931 Family †Aenigmastrophiidae Boucot & Rong, 1994