Template:Hoffman et al., 2016
- Hoffman, B.L., Hageman, S.A. & Claycomb, G.D. 2016 Scanning electron microscope examination of the dental enameloid of the Cretaceous durophagous shark Ptychodus supports neoselachian classification. Journal of Paleontology, 90(4): 741–762. DOI: 10.1017/jpa.2016.64
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