Fishes
Count: [f] 6c;62o;502f;179g
   Class Cephalaspidomorphi Kiaer & Stensiö, 1920 see Class Osteostraci Lankester, 1868
  Count: [*] 1o;1f;31g
     Order Petromyzontiformes Berg, 1940 - lampreys
    Count: [*] 1f;31g
       Family Petromyzontidae Bonaparte, 1831 - lampreys
      Count: [*] 31g
         Subfamily Geotriinae see Family Geotriidae Gill, 1893
        Count: [*] 9g
           Genus Neomordacia Castelnau, 1872
          Count: -