[Phylum] Chordata Bateson, 1885 - chordates
Count: [*†*] 4c;88o;589f;14g; †7c;127o;597f;967g;1s
   Subphylum Craniata auct.
  Count: [*†*] 4c;88o;589f;14g; †7c;127o;597f;967g;1s
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
    Count: [*†*] 3c;87o;588f;14g; †7c;126o;596f;966g;1s
       Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
      Count: [†*] †1c;10o;32f;55g [23 Mar 2024]
         Class †Pteraspidomorpha
        Count: [†*] †10o;32f;55g [23 Mar 2024]
           Subclass †Heterostraci Lankester, 1868
          Count: [†*] †8o;27f;49g [23 Mar 2024]
             Order †Pteraspidiformes Berg, 1940
            Count: [†*] †10f;14g [10 Mar 2024]
               Suborder †Psammosteoidei Kiaer, 1932
              Count: [†*] †6f;8g [10 Mar 2024]
                 Family †Obrucheviidae Tarlo, 1965, "nom. praeval."
                Count: [†*] †2g
                   1 Genus †Aspidosteus Obruchev, 1941, nom. illeg. see Genus Obruchevia Whitley, 1940
                  Count: -
                   2 Genus †Obruchevia Whitley, 1940
                  Count: -