The discovery of the remains of a dinosaur in Egypt's Western Desert, a new species of long-necked herbivore about the size of a city bus, could be the first of several new desert finds, experts say.
"As in any ecosystem, if we went to the jungle we'll find a lion and a giraffe. So we found the giraffe — where's the lion?" said Hesham Sallam, leader of the Mansoura University excavation team and head of the university's Center for Vertebrate Paleontology.
Sallam, four Egyptian and five American researchers authored an article last month in Nature Ecology & Evolution that announced the discovery, named Mansourasaurus shahinae. Experts said the find could shed light on a particularly obscure period of history for the African continent, roughly the 30 million years before dinosaurs went extinct, between 70 and 80 million years ago.
Mansourasaurus shahinae is the only dinosaur from that period to have been discovered in Africa, and it may even be an undiscovered genus. The article authors said the findings "counter hypotheses that dinosaur faunas of the African mainland were completely isolated" during the late Mesozoic period.
Previous theories held that Africa's dinosaurs during that time existed as if on an island and developed independently from their northern cousins. But Mansourasaurus' fossilized skeletal remains suggest an anatomy not very different from those discovered in Europe from the same period, an indication that a land connection between Africa and its northern neighbor may have existed.
While Egypt has a long history of archaeology, paleontology has not enjoyed the same popularity, or had the same success.
In 1911, the German paleontologist Ernst Stromer led an exhibition to the oasis of Bahriya, also in Egypt's Western Desert. There, he discovered four species of dinosaurs, including a predatory type known as the Spinosaurus, all from the Cretaceous period. But all of his findings were later lost in Allied bombing of the Munich Museum during World War II.
Sallam said researchers don't know how Mansourasaurus lived and died, except for the fact that it was a plant eater. There's no indication of whether it lived alone or in a herd.
The bones do bear resemblance to those of another dinosaur discovery in Egypt, that of the Paralititan Stromeri, excavated by an American team from the University of Pennsylvania, whose findings were published in 2001. Both creatures were long-necked, grazing herbivores. The Paralititan Stromeri is believed to have been among the largest known animals, weighing in at 75 tons and over 30 meters (33 yards) long.
The Mansourasaurus' smaller size is more typical of the Mesozoic era, when dinosaurs' time was running out, geologically speaking, according to Sallam. With a long neck and tail, his torso would've been similar to that of an African elephant and measuring tip-to-tail over 10 meters (11 yards) and weighing several tons.
Like a jungle
Egypt's Western Desert would have more closely resembled a coastal jungle during the dinosaur's lifetime, with half of what is the country today under water.
Finding a dinosaur bone in a vast desert was the product of back-breaking work. The team had been scouring the area of the find more than 750 kilometers (466 miles) southwest of the capital for five years before it found the partial skeleton of the Mansourasaurus in 2013.
Sallam said he and a group of doctoral and master's degree students were heading to give a lecture at a local university when they stumbled on a desert road with the appropriate geological outcroppings that they hadn't noticed before. The next morning, the team returned to survey it, covering an area of several kilometers. It wasn't long after they started that one of the students called him on the phone, saying that he should come see the number of bones she'd found.
Sallam said he knew from the first small piece of fossil he was shown that it was a big deal.
"When I first saw it I told them, 'If this comes out as I expect, your names will go down in history,' " he told his students.
There is now some hope the discovery could bring more funding for the paleontology field in Egypt and financing for ongoing studies, Sallam said. But he said he's most proud of making science real for people who otherwise aren't exposed to it as much.
"I mean, we've made the average Egyptian man, or the Arab man, talk about dinosaurs," he said.