Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class †Strophomenata Williams et al, 1996 1 Order †Strophomenida Opik, 1934 2 Order †Productida Sarycheva & Sokolskaya, 1959 3 Order †Orthotetida Waagen, 1884 4 Order †Billingsellida Schuchert, 1893 5 ?Family †Liosomeniidae Liang, 1990