Only three genera survived the end-Jurassic extinction event: Caypullisaurus, Maiaspondylus, and Platypterygius. They did, however, have a worldwide distribution. The last to survive was Platypterygius. This genus became extinct about 30 million years before the end of the Upper Cretaceous period. It happened when there was a deep ocean anoxic event, which wiped out all the animals below pelagic waters. Ichthyosaurs, being reptiles, came to the surface to breath, but the extinction event removed their prey species.
- Fernández M. 2007. Redescription and phylogenetic position of Caypullisaurus (Ichthyosauria: Ophthalmosauridae). Journal of Paleontology 81 (2): 368-375.