(DSM# CH) It is believed that mosasaurs gave birth to live babies rather than laying eggs. These very small vertebrae could belong to the small species of mosasaur listed here or they may be the backbones of the baby of a much larger species.
(DSM DH13) Extinct family of large fish sometimes called the "saber-toothed herring". Enchodus were common in Late Cretaceous seas and survived the K-Pg extinction event. They went extinct in the Eocene.