Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order Rhynchonellida Kuhn, 1949 Superfamily Pugnacoidea Rzhonsnitskaia, 1956 Family †Plectorhynchellidae Rzhonsnitskaia, 1958