That must have been dino-SORE! Hadrosaur that roamed Russia 68 million years had a broken WRIST, study reveals
- Bone of 68-million-year-old ‘majestic’ dinosaur reveals that it had a broken wrist
- Most likely from running or jumping over rough terrain in search of food or water
- Russian dinosaur known as a hadrosaur appeared to have survived the accident
- But resulting limp may have made it difficult to escape predators, experts said
A ‘majestic’ dinosaur that roamed Russia 68 million years ago had a broken wrist, new analysis has revealed.
Experts believe the hadrosaur Amurosaurus riabinini most likely suffered the injury from running or jumping over rough terrain in search of food or water.
They say it appeared to have survived the accident, but the resulting limp may have made it difficult to escape from predators.
The team of experts from Queen’s University Belfast, led by palaeontologist Dr Filippo Bertozzo, analysed a single bone found in a quarry of the city of Blagoveshchensk in far eastern Russia.
Discovery: A ‘majestic’ dinosaur that roamed Russia 68 million years ago had a broken wrist, new analysis has revealed. The hadrosaur is pictured with its injury in an artist’s reconstruction
WHAT WERE HADROSAURS?
Hadrosaurs are known as the duck-billed dinosaurs because of the flat duck-bill appearance of the bones in their snouts.
They were large animals ranging from 23 to 26 ft (7-8 metres) and 2 to 4 tonnes (2,000 to 4,000 kg)
The species was plant-eating and lived from 75 to 65 million years ago.
Paleontologists say hadrosaurs may have been able to outrun a T-rex.
While investigating the cause of some swelling, they say they uncovered some impressive results.
Dr Bertozzo said: ‘After detailed examination of the broken bone, we have discovered that it was from the wrist of a dinosaur known as a hadrosaur Amurosaurus riabinini and that the accident most likely happened when the four-footed animal was running or jumping, possibly whilst roaming the land in search of food and water.
‘Against all the odds the dinosaur survived the accident as we can see that the bone was actually beginning to heal — this suggests that it didn’t die immediately.
‘However, it is likely that the injury led the animal to limp on three limbs, affecting its chances of escaping from predators.’
The researchers used CT-scanning of the bones to identify the fracture.
They wrote: ‘The bone was still healing prior to the moment of death, although the misalignment of the fracture parts appears to have resulted in a malunion of the two fragments.
‘The wrist would have suffered from a continuous weight-bearing pressure that placed stress upon the fracture site and probably caused the animal to limp and perhaps walk on three limbs.’
Professor Eileen Murphy, deputy head of the School of Natural and Built Environment at Queen’s, said: ‘The study of ancient diseases and injuries, whether in past animals or humans, can provide a huge amount of information about the lives of past individuals.
‘This study has enabled us to learn more about the experience of an injured animal in the period leading up to its death; it serves to remind us that even majestic dinosaurs could have accidents.’
In their paper, the authors wrote: ‘Bone fractures are the most common type of injuries preserved in the dinosaur fossil record.
‘Poor healing of deep lesions could lead to infection and misalignment of the fracture parts, causing the animals to limp and jeopardising their survival.
‘A wide variety of fossilised fractures have been identified in dinosaur remains, and the type of bone response can provide information about their resilience and ability to survive even major traumatic events.’
Dr Alastair Ruffell, also from Queen’s, said: ‘For many, to hear about disease and injury in dinosaurs sounds strange — for us, we kind of expect it.
‘But for Filippo to work on this specimen from Russia in such detail, and find out so much from its injury, is pretty exceptional.’
The research has been published in the journal Historical Biology.
KILLING OFF THE DINOSAURS: HOW A CITY-SIZED ASTEROID WIPED OUT 75 PER CENT OF ALL ANIMAL AND PLANT SPECIES
Around 66 million years ago non-avian dinosaurs were wiped out and more than half the world’s species were obliterated.
This mass extinction paved the way for the rise of mammals and the appearance of humans.
The Chicxulub asteroid is often cited as a potential cause of the Cretaceous-Paleogene extinction event.
The asteroid slammed into a shallow sea in what is now the Gulf of Mexico.
The collision released a huge dust and soot cloud that triggered global climate change, wiping out 75 per cent of all animal and plant species.
Researchers claim that the soot necessary for such a global catastrophe could only have come from a direct impact on rocks in shallow water around Mexico, which are especially rich in hydrocarbons.
Within 10 hours of the impact, a massive tsunami waved ripped through the Gulf coast, experts believe.
Around 66 million years ago non-avian dinosaurs were wiped out and more than half the world’s species were obliterated. The Chicxulub asteroid is often cited as a potential cause of the Cretaceous-Paleogene extinction event (stock image)
This caused earthquakes and landslides in areas as far as Argentina.
While investigating the event researchers found small particles of rock and other debris that was shot into the air when the asteroid crashed.
Called spherules, these small particles covered the planet with a thick layer of soot.
Experts explain that losing the light from the sun caused a complete collapse in the aquatic system.
This is because the phytoplankton base of almost all aquatic food chains would have been eliminated.
It’s believed that the more than 180 million years of evolution that brought the world to the Cretaceous point was destroyed in less than the lifetime of a Tyrannosaurus rex, which is about 20 to 30 years.
Source: Read Full Article
