Figure 4. Cranial endocast, endosseous labyrinth, and some endocranial vascular structures of the sauropod dinosaur Spinophorosaurus nigerensis (GCP-CV-4229) from the Jurassic of Aderbissinat, Niger, derived from surface renderings of CT scan; in left lateral (A), caudal (B), ventral (C), and dorsal (D) views.