Taxonomy from Fossilworks.org
References:
Leriche M., 1910. Poissons Oligocènes de la Belgique. Mémoire du Muséum Royal d'Histoire Naturelle de Belgique. T. 5, pp. 229-363.
Cvancara A. M., Hoganson J. W. (1993) Vertebrates of the Cannonball Formation (Paleocene) in North and South Dakota, Journal of Vertebrate Paleontology 13 1, 1-23.
Link: "Trift"