I didn’t realize that mosasaurs showed up almost right after ichthyosaurs went extinct. Those conniving varanoids!
there are seriously no books about plesiosaurs for anyone over the age of 10 -.-
A family tree of Saurischian dinosaurs, showing lineages within this group with direct evidence for feathers. From Zelenitsky et al., 2012.
Version 2, this time with only well-known genera. (Of course, Gallus is the chicken.)