1. Mosasaur bones have also been found with shark teeth embedded in them.

2. Despite the many mosasaur remains collected worldwide, knowledge of the nature of their skin coverings remains in its early stages.

3. A skeleton of Tylosaurus proriger from South Dakota included remains of the diving seabird Hesperornis, a marine bony fish, a possible shark, and another, smaller mosasaur (Clidastes).