Figure 1.

Right bony labyrinth of Lontra canadensis (Lutrinae, Mustelidae): (A) Line drawing of the labyrinth in anterolateral view, illustrating the main anatomical structures referred to in this study, and (B‐D) location of 3D landmarks and sliding semilandmarks, illustrating the dataset used for the musteloid sample in this study (see Table 2 for definition of the landmarks). (B) Anterolateral view. (C) Posterolateral view. (D) Anteromedial view. aam, anterior ampulla; asc, anterior semicircular canal; cc, common crus; co, cochlea; fc, fenestra cochleae (= round window); fv, fenestra vestibuli (= oval window); lam, lateral ampulla; lsc, lateral semicircular canal; pam, posterior ampulla; psc, posterior semicircular canal; vb, vestibule.