[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Count: 3k;35p;34c;158o;1359f;4704g;2825s;11ss
   Pisces
  Count: [*] 3c;45o;226f;705g;1351s
     Class Agnatha Cope, 1889
    Count: [*] 2o;2f;4g;5s
       Order Petromyzontiformes Berg, 1940 - lampreys
      Count: [*] 1f;3g;3s
         Family Petromyzontidae Bonaparte, 1831 - lampreys
        Count: [*] 3g;3s
           1 Genus Lampetra Bonnaterre, 1788
          Count: [*] 1s
           2 Genus Lethenteron Creaser & Hubbs, 1922
          Count: [*] 1s
           3 Genus Petromyzon Linnaeus, 1758
          Count: [*] 1s