The Lower Spilsby Sandstone Member (Upper Jurassic, Portlandian) of the Spilsby Sandstone Formation, north Lincolnshire, has yielded an assemblage of small marine reptiles, including an ichthyosaur and several plesiosaur taxa. All the specimens are from a small area of a quarry near Nettleton, possibly from beds deposited in a small lagoon cut off from the open sea. The fauna is characterized by the small size of the individual animals, and by morphological characteristics that are closer to those of Lower Cretaceous Wealden taxa than to the better known Upper Jurassic fauna that is typically found in deeper water environments.

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.