The Cimoliasauridae are a poorly known family of plesiosaurs from the Jurassic and Cretaceous. They were characterised by a relatively larger head and shorter neck than the Plesiosauridae and Elasmosauridae. Teeth resemble those of the Plesiosauridae. The group is known only from scanty and fragmentary remains.
- Persson, Per Ove 1960. Lower Cretaceous plesiosaurians (Rept.) from Australia. Lunds Unveristets Arsskrift 56 (12): 12-23.