Unusual teeth from a rare and very unique Cretaceous shark, Ptychotrygon vermiculata - a Sclerorhynchoidei shark (a Cretaceous Saw shark family). Oral teeth are included. These are complete species showing exceptional preservation. Specimens of this quality are very difficult to locate. Cretaceous (Lower Santonian - approx. 75 million years ago), Tykbutak, Aktiubinsk region, W. Kazakhstan.