[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass †Osteostracomorphi Class †Galeaspidomorphi Superorder †Polybranchiaspidida Zhu & Gai, 2007 Order †Pituriaspidiformes [monotypic] 1 Family †Pituriaspididae Davis, 1994, nom. nud.