Sawshark rostral denticle (IMAGE)

Penn State

Sawshark rostral denticle

Caption

A rostral denticle of Ischyrhiza mia, a species belonging to an extinct group of sawfishes that lived in North American waters during the late Cretaceous period, around 100 to 65 million years ago. The sample was recovered from a rock formation in New Jersey.

Credit

Todd Cook, Penn State (Courtesy: Wiley Publications)

Usage Restrictions

Educational use only

License

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