A retired physician’s reexamination of a 125-million-year old fossil specimen has unexpectedly yielded an entirely new dinosaur species. While perusing the Dinosaur Island museum’s collection on the Isle of Wight, Lockwood noticed something peculiar about a set attributed to one of the island’s two known iguanodontian species. “This one had particularly long neural spines, which was very unusual.”The anterior-most seven caudal vertebrae in left lateral view with neural spines reconstructed. Istiorachis appears to have been slightly taller than an adult human, with neural spines growing as long as 10 to12 inches. Previous studies indicate iguanodontians first began displaying elongated neural spines during the Late Jurassic.