Gyrodus scale of Kimmeridgian age, approximately 152 to 157 million years ago in the late Jurassic period. This scale came from the Cymodoce Zone of the Kimmeridge Clay Formation, in Weymouth, Dorset. Gyrodus are an extinct species ray-finned fish which existed during the upper Jurassic through to early Cretaceous periods. These marine fish were durophage feeders meaning they fed on hard shelled or exoskeleton bearing organisms. This scale is approximately 1.8 cm in length and is supplied in a small plastic bag with an information label.