Middle Stone Age human teeth from Magubike rockshelter, Iringa Region, Tanzania
Fig 11
A. Scanning electron microscope (SEM) image of the labial surface of the right central incisor, showing grooves exposing the prismatic structure of the enamel (white arrows). B. SEM image of the labial surface of the left central incisor, showing microwear striations (a) and nonmasticatory striations (b).