FIG. 26 in Mystacodon selenensis, the earliest known toothed mysticete (Cetacea, Mammalia) from the late Eocene of Peru: anatomy, phylogeny, and feeding adaptations

FIG. 26. — Mystacodon selenensis (MUSM 1917, holotype). A, posterolateral view of the left mandible showing the extensive wear facets on m2 and the remaining posterior accessory cusp on m2 and m3 and the posterolingual cingulum of m3; B, posterodorsolateral view of left m3. Scale bar: 4 cm.