Brachypterygius extremus Boulenger.
Matrix free well preserved juvenile Ichthyosaur vertebra. The overall shape is that of Richard Owens species, Ichthyosaurus trigonalis which has been superseded.
Jurassic, Kimmeridge Clay.
Oday, Abingdon, Oxfordshire.
Vertebra : 3.8 x 3.8 cm,
