Carpenter , Kenneth, and Wayne Itano. 2019. “Taxonomic Validity of Petalodus Ohioensis (Chondrichthyes, Petalodontidae) Based on a Cast of the Lost Holotype”. Geology of the Intermountain West 6 (February). Salt Lake City, Utah, 55-60. https://doi.org/10.31711/giw.v6.pp55-60.