in 2001, and upgraded to Grade I listed in 2007. In 2018, the Friends of Crystal Palace Dinosaurs ran a crowd funding campaign, endorsed by the guitarist Slash, to build a permanent bridge to Dinosaur Island. The bridge was designed by Tonkin Liu with engineering by Arup. The bridge swings on a pivot so it can be parked when not in use, to prevent unauthorised access. It was installed in January 2021. In May 2021, the nose and mouth of the Megalosaurus sculpture was given an emergency renovation, after it had fallen off the previous year. Twenty-two new teeth and a 'prosthetic jaw' were installed on the sculpture. The renovation was funded by a grant from the Cultural Recovery Fund and fundraising from Friends of Crystal Palace Dinosaurs. The Dinosaur Park Fifteen genera of extinct animals, not all dinosaurs, are represented in the park. At least three other genera (Dinornis, a mastodon, and Glyptodon) were planned, and Hawkins began to build at least the mastodon before the Crystal Palace Company cut his funding in 1855. An inaccurate map of the time shows planned locations of the Dinornis and mastodon. Palaeozoic era The Palaeozoic era is represented in the park by the model rock exposure showing a succession of beds, namely the Carboniferous (including Coal Measures and limestone) and Permian. Crystal Palace's two Dicynodon models are based on incomplete Permian fossils found in South Africa, along with Owen's guess that they were similar to turtles, no evidence has been found to suggest Dicynodon had protective shells. Mesozoic era The Mesozoic era is represented in the park by the model rock exposure showing a succession of beds, namely the Jurassic and Cretaceous, by models of dinosaurs and other animals known from mesozoic fossils, and by suitable vegetation – both living plants and models. Curiously, it is Hylaeosaurus, from the Cretaceous of England, not Iguanodon, that most resembles the giant iguana stereotype of early ideas of dinosaurs. The Hylaeosaurus in reality is much like Ankylosaurus - smallish quadrupedal herbivore with a knobbled armoured back, and spines along its sides. Hawkins's depiction is of a large Iguana-like beast with long sharp spines along its back, which Owen noted were "accurately given in the restoration [by Hawkins, to Owen's instructions, but] necessarily at present conjectural". The head of the Hylaeosaurus model is a fibreglass replica; the original head is on the ground, on a hill