FIG. 21. Digital 3-D in Caudal Cranium Of Thylacosmilus Atrox (Mammalia, Metatheria, Sparassodonta), A South American Predaceous Sabertooth

FIG. 21. Digital 3-D reconstructions of the left osseous labyrinth of selected sparassodonts, based on micro- CT data in A, D, G, lateral, B, E, H, ventral, and C, F, I, dorsal views. Thylacosmilus atrox, paratype, FMNH P14344 (A–C); Sipalocyon gracilis, AMNH VP 9254 (D–F), and Borhyaena tuberata, YPM PU 15120 (G–I; right petrosal inverted). Abbeviations: aam, anterior ampulla; asc, anterior semicircular canal; av, aqueductus vestibuli; cco, crus commune; chlc, cochlear canaliculus (= aqueductus cochlearis); co, cochlea; fc, fenestra cochleae; fv, fenestra vestibuli; lam, lateral ampulla; lsc, lateral semicircular canal; pam, posterior ampulla; psc, posterior semicircular canal.