Age: 165-155 million years old
Period: Middle-Late Jurassic
Field notes: Maximum diameter 105mm. From Oxford, England. Ichthyosaurs were marine reptiles (the name literally means fish lizard) that probably looked a lot like dolphins or sharks.
Find out more at:
en.wikipedia.org/wiki/Ichthyosaur
www.ucmp.berkeley.edu/people/motani/ichthyo/