May, W.J. (2015)
Chondrichthyans of the Excello Shale (Middle Pennsylvanian) of Rogers County, Oklahoma. Transactions of the Kansas Academy of Science, 118(1–2), 68–74
DOI: 10.1660/062.118.0108

Hamm, S.A. & Cicimurri, D.J. (2005)
Middle Pennsylvanian (Desmoinesian) Chondrichthyans from the Lake Neosho Shale Member of the Altamont Limestone in Montgomery County, Kansas. Paludicola, 5(2), 65–76

Ewell, K. & Everhart, M.J. (2005)
A Paleozoic shark fauna from the Council Grove Group (Lower Permian) [Abstract]. Transactions of the Kansas Academy of Science, 108(1/2), 71–72
DOI: 10.1660/0022-8443(2005)108[0069:AOTAMO]2.0.CO;2

Elliott, D.K. & Irmis, R.B. & Hansen, M.C. & Olson, T.J. (2004)
Chondrichthyans from the Pennsylvanian (Desmoinesian) Naco Formation of central Arizona. Journal of Vertebrate Paleontology, 24(2), 268–280
DOI: 10.1671/1978

Itano, W.M. & Houck, K.J. & Lockley, M.G. (2000)
Chondrichthyans from the pennsylvanian Minturn Formation of Colorado [Abstract]. Abstr. 9th Internatl. Symp. Early Vertebrates/Lower Vertebrates, Flagstaff, Arizona, USA, May 2000, p. 11.

Ossian, C.R. (1974)
Paleontology, paleobotany and facies characteristics of a Pennsylvanian delta in southeastern Nebraska. Unpubl. Ph.D. thesis, Univ. Texas, Austin, Texas: 393 pp.

Branson, C.C. (1934)
Permian sharks of Wyoming and of east Greenland. Science, 79(2054), 431
DOI: 10.1126/science.79.2054.431

Branson, C.C. (1933)
Fish fauna of the middle Phosphoria Formation. Journal of Geology, 41(2), 174–183

Branson, E.B. (1916)
The Lower Embar of Wyoming and Its Fauna. Journal of Geology, 24(7), 639–664

Eastman, C.R. (1903)
Carboniferous fishes from the central western States. Bulletin of the Museum of Comparative Zoology at Harvard College, 39(7), 163–226

Hay, O.P. (1902)
Bibliography and catalogue of the fossil Vertebrata of North America. Bulletin of the United States Geological and Geographical Survey of the Territories, 179, 1–868

Leidy, J. (1859)
Descriptions of Xystracanthus arcuatus and Cladodus occidentalis. Proceedings of the Academy of Natural Sciences of Philadelphia, (unnumbered volume), 3