As Kimmerosaurus is known from only a skull (and a few cervical vertebrae), much of the plesiosaur's description comes from its teeth, which are recurved and buccolingually compressed (compressed cheek-side to tongue-side). The premaxilla has only eight teeth, while there are thirty-six teeth on each ramus.Brown, David S.; 1981b; The English Upper Jurassic Plesiosauroidea (Reptilia) and a review of the phylogeny and classification of the Plesiosauria; Bulletin of the British Museum (Natural History), Geology; 35(4) pp.253-347 The parietals of Kimmerosaurus do not form a sagittal crest. The overall skull of Kimmerosaurus is similar to Cryptoclidus but much more broad.
