Photo featured in "Marine Shark" section of Color Guide to Pennsylvanian Fossils of North Texas by Mark McKinzie and John McLeod. Labial face. Missing root and extreme tip on right end of photo.
EDIT: Pennsylvanian is Subperiod, Late is Epoch.
Class: Chondrichthyes
Family: Pristodontidae
Cisco Group
Graham Formation
Finis Shale Member
Texas
Date Collected: 11/24/2012