A leaf-like structure that is a feature of the lamellar dermis that covers the parietal surface of the coffin bone. There are approximately 600 primary lamellae running in a proximo-distal direction down the entire dorsal surface of the distal phalanx. The lamella project at right angles to the surface of the bone and are perpendicular to the papilla of the coronary dermis. Each primary lamella is covered in 100-200 secondary lamellae which also extend in a proximo distal direction and serve to increase the surface area of the dermis.  The horn covering the lamellar dermis is the inner most layer of the hoof wall (stratum lamellatum).