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Here’s what you will learn in this story:
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The common ancestor of all tetrapodes (including humans) was thought to have previously appeared at the dawn of the carbon.
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The fossilized songs from the early reptile are now the oldest known reptiles songs, which means that the ancestor of Tetrapod most likely appeared earlier during the Devonian period.
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These songs are made of nail legs – a characteristic of amniotics. Their appearance pushes the evolution of amniotics by 35-40 million years.
It was raining between 359 and 350 million years. Lizard -like creatures crawled through the mud in what was once gondan (but now Australia), leaving behind prints that became frozen in time, inserting when the mud became stone above the eons. Later, these songs will be found during excavations, which question how much back in time our ancestors of Tetrapod walked on land.
The tetropods (which means “four legs” in Greek) include all amphibians, reptiles, birds and mammals, and are thought to be descended from fish, passed by the forehead that came out of the prime seas of fins that functioned as primitive legs. People are tetrapodes and like all tetropods (except amphibians), we are also amniotics, with eggs that protect developing embryos in amniotic bags. Amniotics are thought to have deviated from amphibians at the dawn of the carbon period, about 355 million years ago. Mammals would split from reptiles and birds only 30 million years later.
The fossil prints were found at the end of a paleontological site in Eastern Victoria, known as the Broken River (or Berrepit in Taungurung, the language spoken by local root people). Whatever left its footprints on the river bank, it provides the first evidence of ground life in the area, and the scars of the nails of the prints suggest that it was amniot – except that amniotics did not develop so early in the carbon period.
“This repels the probable origin of amniotics of the crown of the crown by at least 35-40 million years,” said the Australian and Swedish team of researchers who excavate the Berrepit site recently published in the magazine NatureS “[Amniotes] cannot be much more than a junction than the Devon/carbon border and [the origin of tetrapods] It should be deep in Devon. “
Before this find, the oldest known amniotic fossils are songs from Notalcerta and the bones of Hilonomos. Both species are Sauropsides – part of a larger group of existing and disappeared reptiles and birds that probably lived during the late carbon. It is believed that the ordinary ancestor of all tetrapodi has appeared in the worst years of Carbon, but that changed when this team of experts came across the mysterious steps of Berepod Tetropod. They now believe that the ancestor of Tetrapod appeared during the Devonian and that amniotics began to diverge from them about 395 million years ago, 35 to 40 million years earlier than it was previously thought.
Obviously, the steps come not only from Tetrapod but also from the amniotic, because almost all amniotics have nails or nails. The nail markings scratched the damp ground after a short rainy shower and there is no body or tail data drawn to the ground. While it is impossible to know what this animal actually looks like, the distance between the front and the hind legs shows that it was about 17 cm (about 6.7 inches) from the shoulder to the hips, with unknown lengths of the neck, head and tail. Using a modern water monitor as proxy, researchers have determined that it should be about 80 cm (about 31.5 inches) with a length.
Something else could be demistified by the prints-to believe that the ultimate-unveiled mass disappearance had such a catastrophic impact, it can explain why the tetropods do not appear in the fossil record for another 20 million years. The tetropods dated after the abyss are much more diverse and advanced than their predecessors before the gap. Early carbon sauropsy songs mean that the tetropods should have branched from their common ancestor somewhere during the Devonian, which means that the mass disappearance had a little effect on the evolution of the tetropods.
– The [fossil footprints] They have a disproportionate effect on our understanding of the early evolution of Tetrapod due to their combination of diagnostic characteristics of amniotics and an early, secure date, “the researchers said.” They demonstrate once again the unusual meaning of chance and sulfurity in the study of highly packed parts of the fossils. “
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