A kind of & # 39; primitive turtle & # 39; survived mass extinction 66 million years ago in France
Just a kind of & # 39; primitive turtle & # 39; in the northern hemisphere survived the mass extinction that annihilated dinosaurs 66 million years ago, fossils reveal
- Fossils of species of & # 39; primitive turtles & # 39; Laurasichersis relict in France
- They were dated 56 million years ago, 10 million years after mass. extinction
- It is the first animal of this type found in the northern hemisphere that survived
- Turtles similar to those that are alive today also survived the extinction event that annihilated the dinosaurs.
A species of primitive turtle found in modern France managed to survive the mass extinction event that annihilated dinosaurs 66 million years ago.
Residues of 70 fossilized Laurasichersis relicta turtles were found in a quarry dating back about 56 million years ago.
The study shows that the strange and tiny animal was the only primitive turtle that survived the mass extinction event in the northern hemisphere.
Experts believe that these animals were about 24 inches (60 cm) long and could not retract the head inside their shell.
Researchers studying fossils are still unsure of what allowed this species to survive when so many others died.
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Laurasichersis relicta is a primitive species of turtle. It existed in the northern hemisphere about 56 million years ago (in the photo, the impression of an artist)
Experts believe that these animals were about 24 inches (60 cm) long and could not retract the head inside their shell. Skull fragments and shell and limb fragments were found in a French quarry
WHAT WAS LAURASICHERSIS RELICTA?
Laurasichersis relicta is a primitive species of turtle.
It existed in the northern hemisphere about 56 million years ago.
The only evidence of its existence lies in 70 fossils found in modern France.
Experts believe that these animals were around 24 inches (60 cm) long and could not retract the head inside their shell to protect themselves from predators.
They had a heavily armored shell and hard tips on the neck, legs and tail to defend against predators.
"The reason why Laurasichersis survived the great extinction, while none of the other primitive land turtles in North America, Europe or Asia managed to do so, remains a mystery," said the sole author of the study, Dr. Adam Pérez-García, from the National Distance Education. University (UNED) in Madrid, Spain said.
The most evolved turtles, which are similar to what we see today, also survived the mass extinction of the Cretaceous-Paleogene (K-Pg) caused by a meteorite impact.
But primitive turtles, which lived at the same time, were less able to adapt to the rapidly changing environment.
The difference between the two types of turtles lies in their physical abilities.
Primitive turtles had shells made up of several different pieces and could not retract their heads into their shells to protect themselves from predators.
Modern turtles can hide their head inside their shell to protect themselves. Several of these species survived the catastrophic fall after the meteorite that crashed into what is now Mexico and formed the famous Chicxulub crater.
New research published in the magazine. Scientific reports He found remains of shells, limbs and skulls of primitive turtles, and a decade-long project struggled to learn about their lives and their evolutionary history.
He revealed that adults were about two feet (60 cm) long and had a heavily armored shell and hard tips on the neck, legs and tail to defend against predators.
Laurasichersis relicta is a primitive species of turtle. It existed in the northern hemisphere about 56 million years ago. The only evidence of its existence lies in 70 fossils found in modern France (pictured)
Primitive turtles had a shell composed of several different pieces and could not retract the head inside their shells to protect themselves from predators. Analysis of shell fragments (pictured) revealed that it was more complex than many modern turtles
In the image, a graph that shows how the different turtle species evolved. The pale yellow lineage are the modern turtles that lived in the north and south and survived the extinction. It is seen that Laurasichersis relicta exists after the ass extinction event (horizontal yellow line) and descends from a long-standing Sichuanchelyidae ancestor
The only researcher, Dr. Adán Pérez-García, from the National University of Distance Education (UNED) in Madrid, Spain, says the species lived in Laurasia, which finally fractured and became the entire northern hemisphere.
However, no other sites have been found with surviving fossils of the species, which means how long they lived and what caused their eventual extinction is a mystery.
Primitive turtle species abounded before mass extinction. But in the northern hemisphere, none had been found that survived the extinction event.
However, in the southern hemisphere, one of these archaic turtles also suffered volcanic consequences.
In what was then Gondwana, before the content was divided into what we recognize today, a primitive horned turtle also survived extinction,
It flourished in the millions of years that followed and only died after the last ice age about 10,000 years ago, when prehistoric humans hunted it to extinction.
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