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Ptychodus Anonymous? shark tooth

John S.

By John S.
in Fossil ID

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John S. Regular Member

John S.

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Found this cool tooth in nice condition. I still get confused with the Ptychodus. Eagle Ford group, far north Texas, 86-90 mya. What say you?

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North Central Texas

Eagle Ford Group / Ozan Formation

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MarcoSr Regular Member

MarcoSr

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Could the tooth be from the basal Atco Formation of the Austin Group? It looks more like a Ptychodus mammillaris to me. According to Welton and Farish 1993, P. anonymus has approximately 12 fine transverse ridges and is usually less than 1 cm in greatest dimension with a 14 mm maximum size.

Marco Sr.

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image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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John S. Regular Member

John S.

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Thank you Marco the Atco is certainly possible. I'll post a few pics with measurement tomorrow.

North Central Texas

Eagle Ford Group / Ozan Formation

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  • 1 year later...

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