After Carroll, 1988 and Frickhinger, 1995
<==o Pygopteridae |--o Nematoptychius Miss. Eu. | `-- N. greenocki `--o Pygopterus M. Perm. Gr. U. Perm. L. Trias. Eu. L. Trias. SAf. Spits. `-- P. humboldti
Reference(s):
- Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Carroll, R. L., 1988: Appendix. 594-648
in Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Frickhinger, K. A., 1995: Fossil Atlas – Fishes.
–Mergus – Publishers for Natural History and Pet Books, Hans A.Baensch, Malle, Germany, 1995, pp. 1-1088 - Long, J. A., 1995: The Rise of Fishes: 500 million years of evolution.
–Johns Hopkins University Press, Baltimore & London, pp. 1-223 - Nelson, J. S., 1994: Fishes of the world.
–John Wiley & Sons Inc., New York, 1994, xx-600 - Poplin, C., 1999: Un paléoniscoïde (Pisces: Actinopterygii) de Buxière-les-Mines, témoin des affinités fauniques entre Massif central det Bohême au passage Carbonifère-Permien.
[A paleoniscoid (Pisces: Actinopterygii) from Buxière-les-Mines, evidence of faunal relationships between Massif central and Bohemia at the turn over between Carboniferous and Permian.]
–Geodiversitas: Vol. 21, #2, pp. 147-155 [from abstract]