<==o †CONODONTA [Conodontochordata, Conodontida] (konodontit; conodonts)
   |--o †WESTERGAARDODINIDA
   |  `-- †Westergaardodinidae
   `--o †CONODONTOPHORIDA
      |--o †DISTACODONTACEA
      |  |-- †Proconodontidae
      |  |-- †Clavohanulidae
      |  `-- †Distacodontidae
      |--o †CHIROGNATHACEA
      |  |-- †Oistodontidae
      |  |-- †Chirognathidae
      |  `-- †Rhipidognathidae
      |--o †PANDERODONTACEA
      |  |-- †Acanthodontidae
      |  `-- †Panderodontidae
      |--o †PRIONIODINACEA
      |  `-- †Prioniodiniidae
      |--o †PRIONIODONTACEA
      |  |-- †Periodontidae
      |  |-- †Prioniodontidae
      |  |-- †Balognathidae
      |  `-- †Icriodontidae
      |--o †BRYANTODONTACEA
      |  `-- †Bryantodontidae
      |--o †GONDOLELLACEA
      |  `-- †Gondolellidae
      `--o †POLYGNATHACEA
         |-- †Spathognathodontidae
         |-- †Polygnathidae
         |-- †Pseudopolygnathidae
         |-- †Bactrognathidae
         `-- †Idiognathodontidae


Reference(s):

    Gabbott, S. E., Aldridge, R. J. & Theron, J. N., 1995: A giant conodont with preserved
muscle tissue from the Upper Ordovician of Soth Africa.
–Nature: Vol. 374, 27 April, pp. 800-803

    Janvier , P., 1995 [preview]: Conodonts join the club.
–Nature: Vol. 374, 27 April, pp. 761-762

    Janvier, P., 1999 [preview]: Catching the first fish.
–Nature: Vol. 402, 4 November, pp. 21-22

Long, J. A., 1995: The Rise of Fishes: 500 million years of evolution.

–Johns Hopkins University Press, Baltimore & London, pp. 1-223

    Lundberg, J. G., 1995-1997: Chordata 
--iNet : The Tree of Life

    Purnell, M. A., 1994: Microwear on conodont elements and macrophagy in the first elements.
–Nature: Vol. 374, 27 April, pp. 798-800