Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order Rhynchonellida Kuhn, 1949 Superfamily †Rhynchotetradoidea Licharew, 1956 1 Family †Rhynchotetradidae Licharew, 1956 2 Family †Tetracameridae Licharew, 1956 3 ?Family †Austrirhynchiidae 4 Family †Prionorhynchiidae Williams et al., 2002