Tooth of the xenacanthiform shark Orthacanthus lintonensis Babcock, 2024, from the Upper Freeport Coal (Carboniferous) of Linton, Ohio. The tooth is about 13 mm long. Disclaimer: AAAS and EurekAlert!
Dorsal spine of Orthacanthus adamas from the Upper Freeport Coal (Carboniferous) of Linton, Ohio. The spine is about 71 mm long. Disclaimer: AAAS and EurekAlert! are not responsible for the ...
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