It is believed the creature had lain undiscovered for more than 320,000,000 years.
The new installations, which open on Monday, include the first ever named dinosaur, the Megalosaurus.
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The sale price of the 67 million-year-old fossil exceeded the previous record set by a stegosaurus in 2024.
The dinosaur skeleton, which roamed the planet 67 million years ago, was sold by Sotheby's in New York.
A 67 million-year-old Tyrannosaurus rex will go on sale in New York with a pre-sale value of $30m.
The plant-eating dinosaur, named Uragasaurus kalasinensis, is thought to have lived about 150 million years ago.
Lyme Regis Fossil Festival 2026 is one of the UK's biggest science and heritage weekends.
Devon paleoartists are hoping exhibiting their art will get young people excited about dinosaurs.
