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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

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An unusual tricuspid chondrichthyan tooth from the Lower Permian of Texas, USA. Revista Brasileira de Paleontologia, 8(2), 159–164

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Underdeveloped and unusual xenacanth shark teeth from the Lower Permian of Texas. Proceedings of the South Dakota Academy of Science, 84, 215– 223

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