English: Cross section of the jaw of Helicoprion, drawn after figure 7 in Eating with a saw for a jaw: Functional morphology of the jaws and tooth-whorl in Helicoprion davisii in Journal of Morphology by Jason B. Ramsay, Cheryl D. Wilga, Leif Tapanila Jesse Pruitt, Alan Pradel, Robert Schlader, and Dominique A. Didier. Interior teeth of the whorl not shown.
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