Ptychodus polygyrus

This catalog contains excellent teeth from a durophagous (shell-crushing) shark - Ptychodus polygyrus. These teeth were collected from the Arcadia Park Formation. All teeth are complete and well preserved.

Eagle Ford Group  - The Eagle Ford Group is a sedimentary rock formation deposited during the Upper Cretaceous Cenomanian and Turonian ages (90-95 MYA) that covers much central Texas. Eagle Ford Group contains the following fossil bearing units.

• Arcadia Park Formation is a member of the Eagle Ford Group in Central Texas (Turonian age)
• South Bosque Shale Formation is a member of the Eagle Ford Group in Central Texas (early Turonian)
• Lake Waco Formation is a member of the Eagle Ford Group in Central Texas (Cenomanian)

Kamp Ranch Formation (member) is limestone which is part of the Arcadia Park Fm., Eagle Ford Group that dates to the Middle Turonian age (90 MYA) in Dallas County, Texas