Orthacanthus sp.
Orthacanthus sp. Mucous membrane denticles. Jefferson County, Oklahoma, U.S.A. Ryan Formation. Early Permian. 3.5mm tall.
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Some of my shark and ray collection
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By hybodus
Orthacanthus sp. Mucous membrane denticles. Jefferson County, Oklahoma, U.S.A. Ryan Formation. Early Permian. 3.5mm tall.
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