A man who found a 100 million-year-old fossil has helped to discover a new species of dinosaur.
Described as a 'freak discovery', the fossilised jaw-bone was unearthed at Lightning Ridge, a small outback town in Australia.
The find has helped identify a new prehistoric species - which has now been named the Weewarrasauras pobeni.
Scientists believe the dinosaur would have been two-legged and eaten only plants.
It was discovered by opal buyer Mike Poben, who said "time stood still" when he picked up the fossil and spotted what appeared to be a huge pointed tooth, reports ABC.
He said: "I was drawn to it straight away. It's like time stood still.
"I had prickles up the back of my spine because there was something in the back of my head saying 'tooth', and if it was tooth it was jawbone, and if it was jawbone, which I've never seen before, they're so rare, then it was something major."
Mike handed the fossil to the University of New England in Armidale, where palaeontologist Dr Phil Bell and others spent two years investigating the find.
Dr Bell said: "There are certain features about the teeth that are a dead ringer for a group of dinosaurs we call ornithopods, and these are all characteristically relatively small, dog-sized, bipedal animals that eat plants.
"Unfortunately, the fossil remnants we see are almost always part of mining spoil... but on another hand, we would never get to see even those fragments if it wasn't for mining."
The Weewarrasaurus jaw is now part of the Australian Opal Centre collection, the world's most diverse public collection of opalised fossils - a fossil which has transformed into the opal gemstone over thousands, sometimes millions, of years.
Speaking about what should be done with the fossil after scientific research into its origin ends, finder Mike said: "I think they have to stay in Australia, and they need to be on display in Lightning Ridge. That's where they belong."