Figure 9 in Petrosal and inner ear anatomy and allometry amongst specimens referred to Litopterna (Placentalia)

Figure 9. Computed-tomography slices through the isolated petrosal UFRJ-DG 1035-M. Numbers refer to individual slices that are re-located on the virtually reconstructed translucent petrosal and bony labyrinth at the lower right corner. Abbreviations: aa, anterior ampulla; aav, external aperture of the vestibular aqueduct; A.b.X n., notch/sulcus for the auricular branch of the vagus nerve (X); acan n, notch housing the external aperture of the cochlear canaliculus; acf, external aperture of the cochlear fossula; asc, anterior semicircular canal; cc, common crus; cgsn, canal for the ganglion of spiral nerve; cn, canal and cribriform tract for cochlear nerve; co, cochlear canal; fai, foramen acusticum inferius; fn, canal for facial nerve; fs, facial sulcus; fsa, fossa subarcuata; fsg, foramen singulare; f sup vest, foramen for the superior vestibule area; fv, fenestra vestibuli; la, lateral ampulla; lsc, lateral semicircular canal; lv.ips, crest-like lateroventral border of sulcus for inferior petrosal sinus; pa, posterior ampulla; pl, primary bony lamina; psc, posterior semicircular canal; rtp, rostral tympanic process; scc, secondary common crus; sl, secondary bony lamina; ves, vestibule.