[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass †Osteostracomorphi Class †Galeaspidomorphi Superorder †Polybranchiaspidida Zhu & Gai, 2007 Order †Huananaspidiformes Janvier, 1975 Family †Sanqiaspididae Liu, 1975, nom. praeval. Genus †Sanqiaspis Liu, 1975