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- Fossil evidence tells us that early turtles did not gain their shells and lose their teeth at the same time1. Scientists have discovered the fossilized remains of two prehistoric turtles that had a partial shell, but that lacked the toothless beak of modern turtles2. A 220 million-year-old fossil remains of an early turtle species, Odontochelys semitestacea, were discovered in China. It had a fully developed plastron, but only a partial carapace made up of distinctively broadened ribs and vertebrae on its back3. Paleobiologists have discovered fossils of a monstrous extinct freewater turtle in South America that once swam the swampy, tropical waters of ancient Venezuela and Columbia some eight million years ago during the Miocene Epoch4.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Fossil evidence tells us that early turtles did not gain their shells and lose their teeth at the same time. In 2008, a groundbreaking discovery was announced: Paleontologists had identified the remains of a long-tailed, semiaquatic reptile that lived in China 220 million years ago during the mid-Triassic period.animals.howstuffworks.com/extinct-animals/prehist…In the past decade, scientists have discovered the fossilized remains of two prehistoric turtles that had a partial shell, but that lacked the toothless beak of modern turtles. Recently, however, a fossil turtle was found that had no shell at all, but that did have a beak. It's given scientists a new understanding of the animals' evolution.newatlas.com/prehistoric-beaked-shell-less-turtle/5…Then a clue came in 2008 when the 220 million-year-old fossil remains of an early turtle species, Odontochelys semitestacea, were discovered in China. It had a fully developed plastron (the belly portion of a turtle’s shell), but only a partial carapace made up of distinctively broadened ribs and vertebrae on its back.insider.si.edu/2013/05/first-turtle-shells-are-40-milli…Wearing a horned shell measuring nearly ten feet long, paleobiologists hailing from the University of Zurich have discovered fossils of a monstrous extinct freewater turtle in South America that once swam the swampy, tropical waters of ancient Venezuela and Columbia some eight million years ago during the Miocene Epoch.www.syfy.com/syfy-wire/Scientists-find-enormous-s… - People also ask
WEBFeb 19, 2020 · The 2.4-metre-long shell found in the Tatacoa desert in Colombia belonged to a giant turtle called Stupendemys geographicus, which was twice the size of the leatherback turtle.
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WEBThe shell which was recovered nearby—and is believed to belong to the same species—measures 172 centimeters, or about 5 feet 7 inches, long. That’s the same …
WEBFeb 13, 2020 · The fossils, including a gigantic top shell and the first examples of S. geographicus jaw bones, give new insight into the lives of ancient South American giant …
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WEBJun 7, 2019 · The largest freshwater prehistoric turtle that ever lived—as opposed to slightly bigger saltwater turtles like Archelon and Protostega—the aptly named Stupendemys possessed a six-foot …
Biggest turtle that ever lived had 10 foot shell with horns
WEBFeb 12, 2020 · About five to ten million years ago, giant turtles that dwarfed humans reigned supreme in South America. Its shell reached nearly 10 feet in length and …
- Estimated Reading Time: 11 mins
It’s Turtles All the Way Down in the Fossil Record
WEBDec 26, 2022 · The flatness of a turtle shell, he found, could help paleontologists figure out how deeply a fossil site was originally buried before eons of other geological activity.
WEBMar 13, 2024 · With a maximum shell length of 140 centimeters, the Asian narrow-headed softshell turtle (Chitra chitra) together with the approximately 110-centimeter-long South …
WEBFeb 1, 2009 · Dating back to 220 million years ago, this transitional creature, named Odontochelys semitestacea (“half-shelled turtle with teeth”), is the oldest and most primitive turtle on record....
WEBNov 17, 2022 · The largest extinct freshwater turtle is Stupendemys geographica, which was discovered in South America in the 1970s. Its largest specimens have shells that …
WEBMar 26, 2024 · As little as 9,000 years ago, a sofa-sized turtle paddled around the Brazilian Amazon. The finding, based on a fossilized jawbone, reveals that some of the most …
230-million-year-old turtle fossil deepens mystery of …
WEBAug 22, 2018 · A fossilized turtle discovered in southwestern China fills an evolutionary hole in how the reptiles developed features such as a beak and shell, researchers report 1 on 22 August in Nature.
A gigantic prehistoric turtle shell has been discovered in South
WEBFeb 17, 2020 · The massive carapace of the species, known as Stupendemys geographicus, is believed to be the largest ever found on Earth, and has been identified …
Archelon - Wikipedia
WEBArchelon is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring 4.6 m (15 ft) from head …
Fossilized egg from prehistoric giant turtle reveals baby inside
WEBAug 17, 2021 · The turtle that laid the fossil egg—which is among the largest known from this time—was exceptionally big and likely sported a shell about as long as an average …
Discovery: Turtle shells appeared 40 million years earlier than ...
WEBMay 30, 2013 · The turtle shell is a unique modification, and how and when it originated has fascinated and confounded biologists for more than two centuries. A Smithsonian …
Discovery of 90-million-year-old turtle fossil reveals a new species ...
WEBFeb 14, 2023 · Adrian explained that turtle shells are made of bone, and the baenid turtle's shell is fused and does not have sutures. The team was also able to determine this …
Heroes in a half-shell show how turtles evolved - National …
WEBNov 26, 2008 · Proganochelys, the animal formerly known as the world’s earliest turtle, lived 10 million years after Odontochelys. It, however, did have a fully-formed shell and a …
Odontochelys - Wikipedia
WEBOdontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles before Pappochelys was discovered and Eunotosaurus was …
Fossil first identified as plant is actually a baby turtle
WEBDec 7, 2023 · Cadena examined photos of the fossil and believed it looked like the upper shell of a turtle called the carapace. He realized that not only was it a turtle, but a …
Ancient fossil turtle had no shell - BBC
WEBAug 22, 2018 · The oldest known turtle prior to this find, an animal called Odontochelys, had a fully-formed shell over its bottom surface (a part of the shell known as the …
Turtle shells help decode complex links between modern, fossil …
WEBApr 5, 2019 · She used eastern box turtles, Terrapene carolina – a species that comes in all kinds of shapes, sizes and colors – to make links between the rich variation in …
Prehistoric turtle shell fossil was ‘stupendous’ giant
WEBFeb 26, 2020 · A newly announced turtle fossil of Stupendemys geographicus reveals quite a beast indeed. It could have even matched Archelon as the largest turtle ever.
Archelon: The Giant Sea Turtle of the Cretaceous Period
WEBIt is believed to be the largest turtle that ever existed, with a shell that could measure up to 4.5 meters in length. Archelon belonged to the family Protostegidae, which also …
Rare Louisiana turtle is federally listed as a ‘threatened ...
WEB2 days ago · The U.S. Fish and Wildlife Service will add new protections for a rare turtle whose ridged shell looks like a topographic map, with the goal of keeping it from going …
Why Are Sea Turtles Endangered and How Can We Save Them?
WEBJul 7, 2023 · In total, there are seven species of sea turtles, six of which are found in and around the coastal waters of the U.S. And, according to Melissa Cook, a research …
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