Plesiosaurid indet - probably Colymbosaurus trochanterius ( Owen, 1840).
Matrix free vertebra from a giant predatory marine reptile. In beautiful condition.Shows some slight crushing which is usual. Lovely surface detail. The creamy white colour is very unusual for this locality.
Jurassic, Kimmeridge Clay.
Oday, Abingdon, Oxfordshire.
Vertebra : 10.5 x 10.5 x 4 cm.
