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 †Pentameroidea McCoy, 1844 1 Family †Virgianidae Boucot & Amsden, 1963 2 Family †Pentameridae M'Coy, 1844 3 Family †Subrianidae Sapelnikov, 1963