A creature resembling a hybrid dolphin and crocodile has been identified by scientists examining fossil remains discovered more than a century ago.
The new species, named Tyrannoneustes lythrodectikos, was a marine "super-predator" that lived 163 million years ago.
It belonged to a group of ancient crocodiles with dolphin-like features.
An amateur fossil hunter found the reptile's partial skeleton in a clay pit near Peterborough in the early 1900s.
Experts have only now been able to confirm the identity of the remains, housed at The Hunterian Museum at the University of Glasgow.
The animal had pointed, serrated teeth and a large gaping jaw suited to feeding on large-bodied prey.
It represents a missing link between marine crocodiles that fed on small prey and their super-sized relatives.
The research appears in the Journal of Systematic Palaeontology.