Fig. 10
From: Cranial and mandibular anatomy of Plastomenus thomasii and a new time-tree of trionychid evolution
Three dimensional renderings of the right endosseous labyrinth of Plastomenus thomasii (AMNH FR 6015). A lateral view; B dorsal view; C anterior view; D posterior view. Note that the fenestra ovalis region is incomplete due to breakage along the prootic and opisthotic. Also, the endocast of the fenestra perilymphatica is incomplete due to breakage. asc anterior semicircular canal, cc common crus, fav foramen aquaducti vestibuli, fov fenestra ovalis, fpl fenestra perilymphatica, lam lateral ampulla, lsc lateral semicircular canal, psc posterior semicircular canal, scc secondary common crus