Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order †Athyridida Boucot et al., 1964 Suborder †Athyrididina Boucot et al., 1964 Superfamily †Meristelloidea Waagen, 1883 1 Family †Meristellidae Waagen, 1883 2 Family †Meristidae Hall & Clarke, 1895 3 Family †Triathyrididae Alvarez et al., 1998