A new species of dinosaur "hiding in plain sight" for 30 years in a museum has been identified by British expert.
Professor Paul Barrett, a dinosaur researcher at the Natural History Museum, was able to determine it was different to any other species due to its well preserved skull.
It had been sitting in a museum collection in South Africa for 30 years at the University of Witwatersrand, Johannesburg.
The species has been named Ngwevu intloko - which means grey skull in the Xhosa language
The specimen indicates it was most likely an omnivore, walked on two legs, had a fairly chunky body, a long slender neck and a small boxy head. Scientists say it would have measured three metres (9.84ft) from the tip of its snout to the end of its tail.
Prof Barrett said: "This is a new dinosaur that has been hiding in plain sight.
"The specimen has been in the collections in Johannesburg for about 30 years, and lots of other scientists have already looked at it. But they all thought that it was simply an odd example of Massospondylus."
Massospondylus was one of the first dinosaurs to reign at the start of the Jurassic period. Researchers are now looking closer at many of the supposed Massospondylus specimens, believing there to be much more variation than first thought.
Scientists say the findings will help them better understand the transition between the Triassic and Jurassic period, around 200 million years ago.
Known as a time of mass extinction, it now seems more complex ecosystems were flourishing in the earliest Jurassic than previously thought.
The findings are published in the journal PeerJ.