Asteracanthus ornatissimus Agassiz.
Basal part of the breakwater spine of a hybodontid shark. Typical Faringdon Sponge Beds preservation.
Jurassic, Kimmeridge Clay, Re-worked into Cretaceous, Aptian, Faringdon Sponge Gravels.
Wicklesham Pit, Faringdon, Oxfordshire.
Spine : 5.7 cm long.
