Like Davies, the brothers were fossil hunting at the very same beach when they found some fossilized bones.
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Explaining why they were at this particular beach, Nick said that about 3 years ago he "found an ichthyosaur skull and my brother Robert was looking for the rest of the ichthyosaur."
Robert continued the story from there: "I was looking for fossils out at the low tide mark, and I was just on my way back to the car. I thought I'd have a look around here in a recent rock fall that had happened. While looking through the rocks, I just noticed a few small bits of what I thought were bone, so I picked up some blocks and took them back to the car."
Suspecting the bones were important, the brothers brought the fossils to paleontologists for evaluation. The remains were identified as belonging to a carnivorous dinosaur that was an early cousin of Tyrannosaurus rex. Welsh Dragon lived some 130 million years before T. rex emerged. The fossils are now at National Museum Cardiff.
According to the museum, the new dinosaur hunted small mammals, lizards and other reptiles. Crocodiles thrived in its ecosystem.
Welsh Dragon walked on two legs and had a long tail. It was a warm-blooded animal, and much of its body was probably covered in feathery down with quills along its back.
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While the circumstances surrounding the dino's death are unknown, the scientists believe Welsh Dragon died while young, with its body washing out to sea before settling on the seabed. There, it fossilized with marine sediment and the remains of other small species, such as sea urchins and small fish.
Many of these creatures are now entombed within a cliff edge towering near the Welsh beach. As the edge gradually crumbles away over time, its fossil treasures either wind up on the beach, or are revealed in the edge itself.
Martill is hopeful that Welsh Dragon, now reunited with its missing claws and foot bones, "will help us chart the evolution of dinosaur feet, specifically looking at the number of toes and the nature of the ankle bone."
Visitors to National Museum Cardiff can study the dinosaur too, since its remains are on public display there until Aug. 31. Admission is free.
Illustration: "Welsh Dragon," a new carnivorous dinosaur from Wales. Credit: Nicholls 2015, National Museum Cardiff