Figure 4. Skull and morphological distinctiveness of M. eueu shown by holotype (NMNZ MM003000). (a) Skull in dorsal (left), ventral (centre) and left lateral (right) view (b) periotic in dorsal (left) and ventral (right) view; (c) tympanic bulla in dorsal (left) and ventral (right) view; (d) mandible in dorsal (top) and lateral (bottom) view; (e) mandibular tusks in medial (left) and lateral (right) view. (f) PCA of cranial and mandibular measurements showing clear separation between M. eueu from the SH and M. mirus from the NA. Percentages next to principal components (PCs) denote the total variance explained. Filled stars are holotypes and hollow stars paratypes. (Online version in colour.) Source: (https://www.marinespecies.org/aphia.php?p=sourcedetails&id=425480)
