Late Cretaceous-early Paleocene Period, circa 66 million years B.P. A group of three fossil Plesiosaur sp. marine dinosaur vertebrae, including one apanied by an Otodus obliquus fossil tooth embedded in the matrix. See O’Keefe, F.R., The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia), 2002, Paleobiology, 28: 101-112. 1.19 kg total, 8.6-12.8 cm (3 3/8 - 5 in.). From a Lincolnshire, UK, collection. [3, No Reserve]