‘Monster’ dinosaur fossil might not belong to vicious raptor-like predator

A reconstruction of the herbivorous dinosaurs, prosauropods, based mostly on 220-million-year-old fossil footprints from Ipswich, Queensland, Australia.

Anthony Romilio

Within the Sixties, a crew of Australian coal miners came upon an alarming underground sight: dinosaur tracks. The fossilized footprints’ normal form finally led consultants to color the creature chargeable for them as a vicious, predatory, “raptor-like” monster.

However a brand new in-depth evaluation, revealed Thursday within the journal Historic Biology, means that inference could not have been extra incorrect. This 220 million-year-old dinosaur from the Triassic interval wasn’t a threatening beast out for blood.

It was a four-legged, long-necked, cuddly-looking and delicate vegetarian buddy.

“The extra we regarded on the footprint and toe impression shapes and proportions, the much less they resembled tracks made by predatory dinosaurs,” Anthony Romilio, a paleontologist at The College of Queensland in Australia and lead writer of the research, mentioned in an announcement.

“This monster dinosaur was undoubtedly a a lot friendlier plant eater.”

An uncommon facet of the miners’ discovery — simply west of Brisbane, Australia — was that the prints weren’t situated on the ground. They had been protruding from stone proper above the employees’ heads. 


3D picture of the 220 million-year-old footprint from Ipswich, Queensland. 

Anthony Romilio

“It will need to have been fairly a sight for the primary miners within the Sixties to see large bird-like footprints jutting down from the ceiling,” Romilio mentioned. His group deduced the rationale to be that the frolicking animals had stepped in swampy materials above the mine. 

“After thousands and thousands of years, the plant materials became coal which was extracted by the miners to disclose a ceiling of siltstone and sandstone — full with the pure casts of dinosaur footprints,” Hendrik Klein, co-author and fossil knowledgeable from Saurierwelt Paläontologisches Museum in Germany, mentioned in an announcement.

Despite the fact that the casts had been well-preserved and accessible for evaluation, there nonetheless existed a discrepancy between what was as soon as regarded as the dinosaur’s demeanor and what has been uncovered. The researchers blame it on the shortage of expertise again within the day; earlier examinations solely used 2D references of the fossils. 

“Sadly, most earlier researchers couldn’t instantly entry the footprint specimen for his or her research, as an alternative counting on previous drawings and images that lacked element,” Romilio defined.

His group, as an alternative, re-created the traditional footprints in digital 3D. The tracks, a few of which the paper says reached lengths of 18 inches (46 centimeters), turned out to be most in keeping with a dinosaur group generally known as prosauropods. These tender giants, about 4.6 ft (1.4 meters) tall and practically 20 ft (6 meters) lengthy, had been good-natured plant eaters.


Life reconstruction of the mild 220 million-year-old dinosaur to scale with a 5.6 ft (1.7 meter) tall particular person. 

Anthony Romilio

That is in distinction to the terrifying predators these three-toed marks have lengthy been attributed to: Dinosaurs from the Eubrontes household. 

“This concept precipitated a sensation many years in the past as a result of no different meat-eating dinosaur on this planet approached that measurement through the Triassic interval,” Romilio mentioned. Standing over 6.5 ft (2 meters) tall and feasting on recent meat, the Eubrontes kin had been undoubtedly not hanging in the identical grasses as prosauropods. Besides, maybe, to seize dinner.

Though the prehistoric creature has been moved from the guise of flesh-eater to mild soul, it is footprints are maintained as an vital addition to our repertoire of dinosaur data.

“That is nonetheless a big discovery even when it is not a scary Triassic carnivore,” Romilio mentioned. “That is the earliest proof we now have for one of these dinosaur in Australia, marking a 50 million-year hole earlier than the primary quadrupedal sauropod fossils recognized.”

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