FIGURE 1.

Virtual endocasts of the varanopid brain and bony labyrinth in dorsal view. (a) Mesenosaurus, (b) ROMVP87043, (c) ROMVP86543, (d) Mycterosaurus, (e) Aerosaurus, and (f) Varanodon. Due to the disarticulation of the braincase from the skull roof of Mesenosaurus, the anterior portion of the endocast is visible in left dorsolateral view, while the posterior portion is shown in dorsal view. Scale bars equal 5 mm. cer, cerebrum; CN.V, trigeminal nerve; CN.X‐XI, metotic foramen; CN.XII, hypolossal nerve; ff, floccular fossa; ic, internal carotid artery; ob, olfactory bulbs; ot, olfactory tracts