Fig. 3: Valleculae on the frontal bone of a hadrosaurid dinosaur.
From: From fossils to mind
a, b Internal surface of the frontal bone of a hadrosaurid dinosaur (Amurosaurus riabinini, AEHM 1/240) viewed on the left side and right side. Arrows point to some of the valleculae. (Lauters311, available at https://doi.org/10.5281/zenodo.7454914).
