Systematic catalogue of the species of Vertebrata found in the beds of the Permian epoch in North America, with notes and descriptions. Transactions of the American Philosophical Society, 16, 285–297
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
The Permian fishes of North America. Publications of the Carnegie Institution of Washington, 146, 155–178
Jaws and teeth of American xenacanth sharks. Journal of Paleontology, 26(3), 489–500
Vertebrates from the Halgaito Tongue of the Cutler Formation, Permian of San Juan County, Utah. Journal of Paleontology, 36(3), 529–539
Deformed xenacanthodiid shark teeth from the Permian of Texas. In Martin, J. E., and Ostrander, G. E. (Eds.), Papers in Vertebrate Paleontology Honoring Morton Green. Dakoterra, 3: 22–27
The Arroyo Formation (Leonardian: Lower Permian) and Its Vertebrate Fossils. Texas Memorial Museum Bulletin, 35: 30pp
Vertebrate Microfossils from the Lueders Formation, Albany Group, and the faunal transition from the Wichita Group into the Clear Fork Group, Lower Permian of Texas. Modern Geology, 20, 371–382
Revision der Gattung Orthacanthus Agassiz 1843 (Chondrichthyes: Xenacanthida). Paläontologische Zeitschrift, 72(1/2), 135–147
DOI: 10.1007/BF02987822
Dentitions of late Palaeozoic Orthacanthus species and new species of ?Xenacanthus (Chondrichthyes: Xenacanthiformes) from North America. Acta Geologica Polonica, 49(3), 215–266
Fossil Shark Teeth of the World. Lamna Books, 170 p
Geology and Vertebrate Fauna of a New Site in the Wellington Formation (Lower Permian) of Northern Oklahoma. Oklahoma Geology Notes, 62(2), 63–66
New specimens of xenacanth and hybodont sharks (Elasmobranchii: Xenacanthida and Hybodontoidea) from the Lower Permian of southwestern Oklahoma. Oklahoma Geology Notes, 63(4), 136–147
Evidence For Enameloid In Xenacanthid Shark Teeth [Abstract]. Proceedings of the South Dakota Academy of Science, 85, 295
Handbook of Paleoichthyology, Vol. 3D: Chondrichthyes Paleozoic Elasmobranchii: Teeth Verlag Dr. Friedrich Pfeil, pp. 168, 154 fig., 4 Tab.
Sharks from the geraldine bonebed, lower permian of Texas [Abstract]. Journal of Vertebrate Paleontology, 32(Suppl. 1), 118
DOI: 10.1080/02724634.2012.10635175
Possible origin of the xenacanth sharks Orthacanthus texensis and Orthacanthus platypternus in the Lower Permian of Texas, USA. Historical Biology, 24(4), 369–379
DOI: 10.1080/08912963.2012.669128
Xenacanth Sharks and other Vertebrates from the Geraldine Bonebed, Lower Permian of Texas. New Mexico Museum of Natural History and Science, Bulletin, 60, 161–167
Vertebrate biostratigraphy and biochronology of the upper Paleozoic Dunkard Group, Pennsylvania-West Virginia-Ohio, USA. International Journal of Coal Geology, 119, 79–87
DOI: 10.1016/j.coal.2013.04.007
A new method to determine volume of bromalites: morphometrics of Lower Permian (Archer City Formation) heteropolar bromalites. Swiss Journal of Palaeontology, 132(2), 221–238
DOI: 10.1007/s13358-013-0057-z
Lower Permian Freshwater Sharks and Fishes of Texas and Oklahoma. published by the author himself, 118pp
Stable and radiogenic isotope analyses on shark teeth from the Early to the Middle Permian (Sakmarian–Roadian) of the southwestern USA. Historical Biology, 26(6), 710–727
DOI: 10.1080/08912963.2013.838953
A multitaxic bonebed near the Carboniferous-Permian boundary (Halgaito Formation, Cutler Group) in Valley of the Gods, Utah, USA: Vertebrate paleontology and taphonomy. Palaeogeography, Palaeoclimatology, Palaeoecology, 499, 72–92
DOI: 10.1016/j.palaeo.2018.03.017
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
