Marine reptile skull Stenopterygius Quadriscissus, Jurassic Germany (150 million years ago), length 69 cm, with base

Note: this skull belonged to a predatory Jurassic marine reptile. Although its morphology may resemble that of a dolphin, the Ichtyosaur family is linked to reptiles. The largest example from this family was found in Canada and measured over 20 metres long.