Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Linguliformea Williams et al., 1996 Class Lingulata Gorjansky & Popov, 1985 1 Order Lingulida Waagen, 1885 2 Order †Acrotretida Kuhn, 1949 3 Order †Siphonotretida Gorjansky, 1960