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A very large Jurassic ammonite
To the left is a picture of the Dracorex skull now on exhibit at the Children's Museum
Some convergence with the carnassials of other predatory mammal groups has also been noted
Its long tail was stiffened with ligaments and ended in a diamond-shaped vane that was characteristic to Rhamphorhynchus
Iguanodon Thumb Spike Deinonychus A very large Jurassic ammoniteThumbs up! This unique thumb spike belongs to Iguanodon, a plant eating dinosaur. Iguanodon's hand worked backwards: the thumb couldn't move (but worked well as a weapon) and the "pinky" finger wrapped around to grasp. Cast from a scientifically accurate model in fine museum quality resin. Specs: Iguanodon. Early to Middle Cretaceous (140 110 m. y. a.). Shipping Included