Fig. 1: Snake tooth template illustrating the landmarks used for geometric morphometric analysis. 3D mesh of a dentary tooth of Natrix tessellata (HUJI 16537) in medial (left) and anterior (right) view. The scan is semi-transparent to show the inner layer of the tooth. Landmarks are represented by spheres colored in red for anatomical landmarks, yellow for curve semi-landmarks and black for surface semi-landmarks. A total of 221 landmarks were used to describe the 3D shape of snake teeth.