Chordata Bateson, 1885 - chordates
   Class †Ostracophori
     ?Order †Antiarcha (Cope, 1885) [monotypic] see [unranked] Antiarchi Cope, 1885
       19 Family †Astrolepidae see Family Asterolepidae Traquair, 1888
       19.0 [Family †Bothrolepidae nom. imperf.] see Family Bothriolepidae Cope, 1886, nom. illeg.
       19.0 [Family †Pterichthyidae] see Family Asterolepididae Traquair, 1888 (1856), nom. praeval.