Hey everyone!   I recently got a few marine reptile teeth from various formations in the UK, including this partial plesiosaur tooth from the Oxford Clay. The enamel is only partially preserved, but appears unworn and allows for a good look at the enamel ridges of this section.     The curved, rather robust shape of the tooth and the irregular distribution of the pretty prominent enamel ridges made me move away from ichthyosaur or machimosaurid as an ID, and seemed