51. Wang, Q. Z., Zhao, Z. K., Wang, X. L., Jiang, Y. G. & Zhang, S. K. A new oogenus of macroelongatoolithid eggs from the Upper Cretaceous Chichengshan Formation of the Tiantai Basin, Zhejiang Province and a revision of the macroelogatoolithids. Acta Palaeontol. Sinica ...
On the ventral surface of the symphysis there is small flat area, rather than a distinct hourglass-shape or dumbbell-shaped depression in Caenagnathus and Chirostenotes (Fig. 1e)5. This flat area is likely to have played a similar role as the depression which accommodates the genioglossus...