Nothosaurus Tooth

0.32" (0.83 cm) Nothosaurus marchicus tooth from the Vossenveld Formation of Chrzanow are in Poland. 238-227 Million years old from the middle Triassic. 

Nothosaurus was a semi-aquatic reptile that likely lived a lifestyle close to that of modern-day seals. Northosaurus was a close relative to the group that plesiosaurs and pliosaurs would arise from.