Latest news with #Plesionecteslongicollum
Indianapolis Star
6 days ago
- Science
- Indianapolis Star
New species of 'Jurassic sea monster' identified in old fossil
Paleontology researchers in Europe have identified a new species of ancient marine reptile – often referred to as a "Jurassic sea monster" or "sea dragon" – that existed nearly 183 million years ago. The newly classified species of plesiosaur (Plesionectes longicollum, which means "early swimmer with long neck"), likely had the distinction of having the longest neck of other plesiosaurs during the Early Jurassic period (from about 174.7 to 201.4 million years ago), said Sven Sachs of the Naturkunde-Museum Bielefeld, the study's lead author. The bones of the reptile – not a dinosaur – were found in 1978 by Gotthilf Fischer, owner of a quarry and a small museum in Holzmaden, Germany, wrote Sachs and co-author Daniel Madzia from the Polish Academy of Sciences in the journal PeerJ Life & Environment on Aug. 4. The Holzmaden region in southwest Germany has historically been a hotbed for Jurassic period discoveries including other species of plesiosaurs, which were piscivorous reptiles (they fed on fish), thalattosuchians (marine crocodiles), and dolphin-like marine reptiles known as ichthyosaurs, which have been found to be as long as 65 feet. Jupiter-Venus conjunction: How to see our solar system's 2 brightest planets in August Other researchers had noted the distinguishing characteristics of the plesiosaur's skeleton, which is in the Stuttgart State Museum of Natural History. "This specimen has been in collections for decades, but previous studies never fully explored its distinctive anatomy," Sachs said in a news release about the research. "Our detailed examination revealed an unusual combination of skeletal features that clearly distinguish it from all previously known plesiosaurs." The new species had at least 43 vertebrae and perhaps as many as 45 – the remains of the plesiosaur's skull is smashed and not as well-preserved – "the long neck is special for a plesiosaur from the Lower Jurassic," Sachs told USA TODAY. In addition to a very long neck, Plesionectes longicollum had "a rather small head," Sachs said. But it "was an agile swimmer with paddle like limbs." The reptile also had more back vertebrae than most other plesiosaurs of the period and had V-shaped joints between vertebrae in the neck and chest, he said. This newly-identified plesiosaur measured about 10.5 feet and is the oldest known plesiosaur found in the region, where the Tethys Sea covered much of Europe into the Cenozoic era, which began 66 million years ago. Fossils of plesiosaurs have been dated back to the Triassic period about 250 million years ago into the Cretaceous period, before dinosaurs vanished about 65 million years ago, according to Britannica. Plesiosaurs were known to have lived in North America, Asia and Australia, and in the Pacific Ocean and European seas. Plesiosaurs devoured all manner of marine life including squid and other plesiosaurs. But those with a long neck, such as Plesionectes longicollum, "mainly ate fish," Sachs said. Some of the bones suggest the fossil represents "not an adult but more a older juvenile or young subadult," he said. "But it is possible … that it was an adult that retained anatomical features one would expect in a juvenile." Regardless, the identification reveals another form of prehistoric life in a region already fertile for fossil finds. "This discovery adds another piece to the puzzle of marine ecosystem evolution during a critical time in Earth's history," Madzia said in a statement. "The early Toarcian period when this animal lived was marked by significant environmental changes, including a major oceanic anoxic event that affected marine life worldwide." That period of global warming in the Jurassic period, scientists say, led to loss of oxygen in water and the extinction of many species. The identification of a new pleisosaur in the Holzmaden region – this brings the findings up to six different kinds – "shows that the fauna there was quite diverse," Sachs said. Mike Snider is a national trending news reporter for USA TODAY. You can follow him on Threads, Bluesky, X and email him at mikegsnider & @ & @mikesnider & msnider@
USA Today
6 days ago
- Science
- USA Today
New species of 'Jurassic sea monster' identified in old fossil
Paleontology researchers in Europe have identified a new species of ancient marine reptile – often referred to as a "Jurassic sea monster" or "sea dragon" – that existed nearly 183 million years ago. The newly classified species of plesiosaur (Plesionectes longicollum, which means "early swimmer with long neck"), likely had the distinction of having the longest neck of other plesiosaurs during the Early Jurassic period (from about 174.7 to 201.4 million years ago), said Sven Sachs of the Naturkunde-Museum Bielefeld, the study's lead author. The bones of the reptile – not a dinosaur – were found in 1978 by Gotthilf Fischer, owner of a quarry and a small museum in Holzmaden, Germany, wrote Sachs and co-author Daniel Madzia from the Polish Academy of Sciences in the journal PeerJ Life & Environment on Aug. 4. The Holzmaden region in southwest Germany has historically been a hotbed for Jurassic period discoveries including other species of plesiosaurs, which were piscivorous reptiles (they fed on fish), thalattosuchians (marine crocodiles), and dolphin-like marine reptiles known as ichthyosaurs, which have been found to be as long as 65 feet. Jupiter-Venus conjunction: How to see our solar system's 2 brightest planets in August Other researchers had noted the distinguishing characteristics of the plesiosaur's skeleton, which is in the Stuttgart State Museum of Natural History. "This specimen has been in collections for decades, but previous studies never fully explored its distinctive anatomy," Sachs said in a news release about the research. "Our detailed examination revealed an unusual combination of skeletal features that clearly distinguish it from all previously known plesiosaurs." The new species had at least 43 vertebrae and perhaps as many as 45 – the remains of the plesiosaur's skull is smashed and not as well-preserved – "the long neck is special for a plesiosaur from the Lower Jurassic," Sachs told USA TODAY. In addition to a very long neck, Plesionectes longicollum had "a rather small head," Sachs said. But it "was an agile swimmer with paddle like limbs." The reptile also had more back vertebrae than most other plesiosaurs of the period and had V-shaped joints between vertebrae in the neck and chest, he said. What did the newly discovered Jurassic sea monster eat? This newly-identified plesiosaur measured about 10.5 feet and is the oldest known plesiosaur found in the region, where the Tethys Sea covered much of Europe into the Cenozoic era, which began 66 million years ago. Fossils of plesiosaurs have been dated back to the Triassic period about 250 million years ago into the Cretaceous period, before dinosaurs vanished about 65 million years ago, according to Britannica. Plesiosaurs were known to have lived in North America, Asia and Australia, and in the Pacific Ocean and European seas. Plesiosaurs devoured all manner of marine life including squid and other plesiosaurs. But those with a long neck, such as Plesionectes longicollum, "mainly ate fish," Sachs said. Some of the bones suggest the fossil represents "not an adult but more a older juvenile or young subadult," he said. "But it is possible … that it was an adult that retained anatomical features one would expect in a juvenile." Regardless, the identification reveals another form of prehistoric life in a region already fertile for fossil finds. "This discovery adds another piece to the puzzle of marine ecosystem evolution during a critical time in Earth's history," Madzia said in a statement. "The early Toarcian period when this animal lived was marked by significant environmental changes, including a major oceanic anoxic event that affected marine life worldwide." That period of global warming in the Jurassic period, scientists say, led to loss of oxygen in water and the extinction of many species. The identification of a new pleisosaur in the Holzmaden region – this brings the findings up to six different kinds – "shows that the fauna there was quite diverse," Sachs said. Mike Snider is a national trending news reporter for USA TODAY. You can follow him on Threads, Bluesky, X and email him at mikegsnider & @ & @mikesnider & msnider@ What's everyone talking about? Sign up for our trending newsletter to get the latest news of the day
Arabian Post
7 days ago
- Science
- Arabian Post
Ancient Fossil Reveals Jurassic Marine Reptile
A remarkable discovery in palaeontology has emerged from the re-examination of a fossil originally unearthed over four decades ago in the Posidonia Shale of Germany. The fossil, which has long been a subject of scientific intrigue, has now been identified as belonging to a previously unknown species of long-necked marine reptile, Plesionectes longicollum. This breakthrough finding significantly alters the understanding of marine life during the Jurassic period, shedding new light on the complexity of ocean ecosystems during a time of considerable upheaval. The fossil, originally discovered in the late 1970s, had been stored in museum collections for years, with its potential significance largely overlooked until now. Detailed analysis by a team of scientists, aided by advances in imaging and skeletal reconstruction technology, has allowed them to draw new conclusions about the specimen's place within the wider group of marine reptiles known as plesiosaurs. Unlike most known plesiosaurs, Plesionectes longicollum stands out due to its remarkably long neck and the overall preservation of its skeletal structure. This creature, which would have lived around 150 million years ago, provides new insights into the diversity of marine reptiles during the Jurassic period, a time when Earth's oceans were undergoing significant transformations. The long neck suggests it could have been a highly specialised predator, using its flexibility to hunt a range of prey in the complex marine environments of the era. ADVERTISEMENT The discovery of Plesionectes longicollum is also significant because it represents the oldest known plesiosaur from the Holzmaden area, a site famous for its exceptional preservation of marine fossils. This finding not only expands the knowledge of Jurassic marine life but also suggests that the marine ecosystems of the time were more diverse and complex than previously believed. The Posidonia Shale, where the fossil was found, is renowned for its exceptional preservation conditions, which have allowed many ancient creatures to be preserved with unprecedented detail. The shale beds, dating back to the Jurassic period, were deposited in an environment that was rich in organic material, creating conditions that preserved the soft tissues and skeletons of marine life. The significance of this discovery lies in its contribution to the understanding of the evolutionary history of plesiosaurs, a group that dominated the oceans during the Mesozoic era. For decades, scientists have debated the origins and evolutionary paths of these marine reptiles, and the new findings provide key evidence that adds complexity to the established timeline of their development. The long neck of Plesionectes longicollum is not only a fascinating adaptation but also serves as a clue to the diversity of ecological niches occupied by these animals during their reign. Plesiosaurs are often depicted with their characteristic long necks and four flippers, but the new species challenges some of the assumptions previously held about their behaviour and evolutionary progression. By adding a new species to the plesiosaur family tree, researchers now have the opportunity to revise their understanding of the ecological roles these reptiles may have played in their environments. What makes this find particularly compelling is the timing of its discovery. The Jurassic period was a time of great oceanic instability, marked by fluctuating sea levels and significant climatic changes. It was also a period in which the marine reptiles, including the ancestors of plesiosaurs, were diversifying rapidly. The evidence now suggests that during this turbulent time, marine ecosystems were capable of supporting a wide variety of life forms, each occupying unique ecological niches that were not fully appreciated until now. In addition to expanding the scientific understanding of plesiosaurs, the discovery of Plesionectes longicollum also raises important questions about the conditions that led to the extraordinary preservation of fossils in the Posidonia Shale. The remarkable quality of the fossil, with many of its bones and features preserved in exquisite detail, is indicative of the exceptional preservation conditions that existed during the Jurassic period in this region.
India Today
04-08-2025
- Science
- India Today
Frozen in time: Ancient sea monster discovered in Germany's Jurassic fossil beds
Paleontologists have unveiled a new species of ancient marine reptile from Germany's famed Posidonia Shale fossil beds, offering fresh insights into ocean ecosystems that thrived nearly 183 million years newly identified species, named Plesionectes longicollum ('long-necked near-swimmer'), expands the diversity of plesiosauroids, a group of long-necked marine reptiles that roamed Jurassic seas during the age of nearly complete skeleton, which remarkably preserves traces of fossilised soft tissue, was originally excavated in 1978 from a quarry in Holzmaden, Southwest Germany. Despite its early discovery, only recent comprehensive scientific analysis fully revealed its unique anatomical traits that set it apart from all known 'This specimen has been in collections for decades, but previous studies never fully explored its distinctive anatomy,' said Sven Sachs of the Naturkunde-Museum Bielefeld, the study's lead author. 'Our detailed examination revealed an unusual combination of skeletal features that clearly distinguish it from all previously known plesiosaurs.'Co-author Dr. Daniel Madzia of the Polish Academy of Sciences highlighted the specimen's significance as the oldest known plesiosaur from the Holzmaden the individual was immature at death, its unique features were sufficiently developed to warrant classification as a completely new genus and discovery sheds light on marine ecosystem evolution during the early Toarcian period, a time marked by profound environmental shifts including a major oceanic anoxic event that impacted marine life Posidonia Shale formation, renowned for its exceptional fossil preservation, had previously yielded five other plesiosaur species representing all three major plesiosaur lineages.'This discovery adds another piece to the puzzle of marine ecosystem evolution during a critical time in Earth's history,' Dr. Madzia said. The fossil, cataloged as specimen SMNS 51945, is permanently housed at Stuttgart's Staatliches Museum fr addition of Plesionectes longicollum not only deepens our understanding of Jurassic marine biodiversity but further cements the Posidonia Shale's status as a crucial window into prehistoric ocean life.- Ends
