A mystery fossil at Doncaster Museum has been identified as a new species of marine reptile which would have lived 183 million years ago.
The fossil, named Fizzy in a competition, was labelled as an ichthyosaur.
Staff had believed it was a plaster cast replica, but after an investigation by palaeontologist Dean Lomax, it was identified as a brand new species.
The new species has been named Ichthyosaurus anningae in honour of the British collector, and woman in science, Mary Anning, who first collected ichthyosaurs in the early 1800s.
It is the first new Ichthyosaurus identified for almost 130 years. The fossil was originally discovered in the late 1970s along the Dorset Coast, around Charmouth and Seatown, near Lyme Regis.
It represents an almost complete skeleton including a well preserved skull with teeth and is roughly 183 million years old.
Fizzy also comes complete with its last meal before it died.
Dean gave ITV Calendar a detailed look at Fizzy the fossil:
Peter Robinson, the museum curator, told ITV Calendar the discovery would influence research for years to come: