Brachiopoda Duméril, 1806 - brachiopods Rhynchonelliformea Williams et al., 1996 Rhynchonellata Williams et al., 1996 Rhynchonellida Kuhn, 1949 Pugnacoidea Rzhonsnitskaia, 1956 †Plectorhynchellidae Rzhonsnitskaia, 1958