Articles tagged with Vertebrate Paleontology
Researchers have published the results of their scientific findings on a juvenile Chasmosaurus, one of the rarest dinosaur discoveries. The study provides new insights into the evolution and life history of horned dinosaurs.
Paleontologists discovered a spiral valve similar to sharks and rays in a Triassic bony fish fossil, providing insights into the evolution of vertebrates' gastrointestinal tracts. The gut contents reveal a straight stomach and high energy requirements for an energetic lifestyle.
A newly discovered skeleton of the hyaenodontid Galecyon provides insight into the ecology and evolution of early mammalian carnivores. The study reveals diverse habitat preferences among early hyaenodontids, explaining how they coexisted despite similar diets and body sizes.
Fossils of ancient sharks estimated to be between 18 and 26 feet in length, with the largest specimen being 25% bigger than today's largest predatory shark. The discovery pushes back the fossil record of giant sharks by 170 million years.
Paleontologists discover two new transitional species of duckbilled dinosaurs with intermediate characteristics, suggesting a shift in growth patterns and development over time. The findings provide insights into the evolution of hadrosaurid dinosaurs, highlighting the importance of heterochrony in understanding evolutionary processes.
Researchers have discovered that ancient elasmosaurs, such as Aristonectes and Morturneria, used a comb-like structure in their jaws to strain out food particles from the water. This unique feeding style is similar to that of modern baleen whales and allows for efficient collection of food particles.
Researchers analyzed over 500 mummified seal remains to understand the impact of changing ice conditions on their diet and ecology. Crabeater seals showed little isotopic change, while Weddell seals underwent a shift in dietary values, indicating adaptations to a changing environment.
A new study on the fossil bone growth of Ophiacodon, a distant relative of mammals, reveals that it was at least partly 'warm-blooded', challenging the long-held theory of its origin. The findings suggest that mammalian endothermy evolved earlier than previously thought, dating back to the late Carboniferous period.
The study found that mammal body size decreased by 10-20% during warm periods in the Bighorn Basin, with some lineages experiencing dwarfing. The findings add to evidence of a link between climatic change and animal populations.
New data suggests that ancient humans played a role in the extinction of large mammals, birds and lizards in Australia. The study's findings place human predation as the most likely cause, with a 10,000-year lag between human arrival and impact on megafauna.
Researchers discovered that dinosaurs utilized their elaborate nasal passages as heat exchangers to maintain optimal brain temperatures. This innovative mechanism allowed them to regulate their body temperature efficiently, solving the long-standing puzzle of how dinosaurs kept their brains from overheating despite their large bodies.
Researchers found a decrease in weaning age among fossil mammoths, suggesting human overhunting was the primary cause of their extinction. The study used nitrogen isotopes preserved in tusks to estimate weaning ages and found a significant decrease from 7 to 4 years.
Researchers from Uppsala University and IVPP in Beijing combined palaeontological and genomic data to determine that enamel originated in the skin and colonized the teeth much later. The study found that ganoine, an enamel-like tissue, is expressed in the skin of certain fish species, suggesting a possible connection between the two.
Fossil skulls from 35 million year old sediments in Antarctica have shed light on the changes in penguin brains that accompanied their transition to water. The findings indicate that early penguins had many of the adaptations of living forms, while having a few unique traits not seen in modern ones.
A 333-million-year-old fossil discovery is rewriting the history of vertebrate evolution. The ancient salamander-like animal spent significant time on land, challenging previous theories about its origin.
A new species of terror bird, Llallawavis scagliai, has been discovered with exceptionally preserved fossils revealing details about its anatomy and sensory capabilities. The study provides insights into the evolution, behavior, and ecology of this group of fossil birds.
The discovery of a new turtle genus in Wyoming provides insight into how animals may respond to future climate change. Modern-day turtles may struggle to migrate northward due to habitat loss and human pressures, leading to some species' potential extinction.
A new fossil analysis reveals that Vintana sertich was a badger-sized, herbivorous animal with keen senses of smell and vision. The study sheds light on the diversity of Mesozoic mammals and their paleoecology.
Ankylosaurs had a unique nasal structure that allowed them to regulate their body temperature. The long, winding passageways would have warmed the inhaled air and cooled the blood before it reached the brain. This adaptation likely helped maintain the dinosaur's stable brain temperature.
A nearly complete 9,300-year-old frozen bison mummy was recently uncovered in Eastern Siberia. The Yukagir bison mummy has a preserved brain, heart, blood vessels, and digestive system, providing valuable insights into the biology of the species at the end of the Ice Age.
Researchers used 3D laser scanning to study the only known complete dodo skeleton, revealing new details on its behavior, size, and evolution. The study provides insights into how the flightless dodo may have evolved its giant size and locomotor mode.
A new study suggests that pterodactyls' inability to take off with wingspans over 12m led to their size limits. The research used computer modeling and found that even the largest pterosaur models could sustain flight using intermittent powered flight, but took-off proved too challenging.
A new study reveals that competition with ungulates, intensified by climate change, is the main reason for lagomorphs' limited diversity. Fossil records show that lagomorphs were capable of becoming larger than today, but were suppressed by the presence of competitors.
A 47 million-year-old horse fossil in Germany preserves the uterus and an unborn foal, revealing that early horses had a similar reproductive system to modern horses. The discovery provides valuable insights into the evolution of equine reproduction.
New research reconstructs Archaeopteryx feather color as matte black with darker tip, shedding light on fossil preservation. Advanced imaging technologies provide definitive proof of melanosomes in fossil record.
The Catoca diamond mine in Angola revealed 118 million-year-old dinosaur and crocodile tracks, with the largest mammalian track attributed to a raccoon-sized animal. No fossil bones or teeth of such an animal have been found elsewhere in Africa or the world.
Researchers employed high-resolution X-ray CT scanning and digital visualization techniques to restore a complete skull of the 3-4m herbivorous dinosaur Erlikosaurus andrewsi. The team digitally dissected the skull, filling in breaks and cracks, duplicating missing elements, and reversing deformation, resulting in a life-like restoration.
A new fossil dolphin species from the Miocene era has been discovered in Peru, shedding light on the history and relationships of river dolphins. The species, Huaridelphis raimondii, is part of a rare extinct family, squalodelphinids, which are related to endangered Ganges and Indus river dolphins.
A new study reveals ancient hedgehog and tapir fossils from Driftwood Canyon Provincial Park in British Columbia, which lived around 52 million years ago. The discovery fills a significant gap in the geographic distribution of mammals during this period.
Nizar Ibrahim, a University of Chicago paleontologist, has been selected to National Geographic's Emerging Explorers program. He receives a $10,000 award to aid further research and exploration in the deserts of North Africa, where he discovers fossil footprints and a new species of flying reptile.
A new study re-describes the oldest species of dolphin, Eodelphis kabatensis, shedding light on their origins and evolution. The discovery resolves a discrepancy between fossil records and molecular-based studies, providing crucial insights into the evolutionary history of dolphins.
The fossil, Eocasea martini, provides evidence that large caseid herbivores evolved from small carnivorous ancestors. This finding contributes to our understanding of the early evolution of herbivory in terrestrial vertebrates.
Fossils from the Middle-Upper Jurassic Period in northeastern China have revealed an exceptional window into life approximately 160 million years ago. The Daohugou Biota contains superbly preserved specimens of a diverse group of amphibian, mammal and reptile species.
New fossils from Belgium have revealed the earliest known ancestor of modern carnivores, with species such as lions, tigers and bears tracing their ancestry to primitive carnivorous mammals. The new specimens, including over 250 teeth and ankle bones, provide valuable insights into the evolutionary history of these iconic animals.
A new, giant species of extinct platypus, Obdurodon tharalkooschild, has been discovered in Australia. The estimated length of the species is nearly a meter, twice that of the modern platypus. The fossil record suggests that platypuses became smaller and reduced their teeth through time.
Researchers found that mammalian body size decreased during two ancient global warming events, the Paleocene-Eocene Thermal Maximum (PETM) and Eocene Thermal Maximum 2 (ETM2). The study suggests that mammals may adapt to extreme warming by becoming smaller.
Researchers discovered that the giant Triassic amphibian Metoposaurus had a two-seasonal climate and needed water for its lifestyle. The species used broad, flat head and forearms to burrow under the ground during dry season, while its growth pattern revealed unique adaptations.
A new study reveals that a Pangean desert supported a unique fauna, including the giant pareiasaur Bunostegos, which sported large, bulbous skulls resembling modern giraffe horns. The discovery supports the theory of central Pangea being climatically isolated, allowing this relict fauna to evolve distinct anatomical features.
A new study reveals a previously overlooked diversity of small dinosaurs, including the smallest known plant-eating dinosaur species from Canada. The research team identified Albertadromeus syntarsus as a speedy runner that lived in what is now southern Alberta during the Late Cretaceous period, approximately 77 million years ago.
Researchers have discovered two new ancient extinct alligator-like animals and an extinct hippo-like species in Central America during the Miocene period. The fossils shed light on species distribution before the formation of the Isthmus of Panama.
New fossil discoveries shed light on the history of animal distributions between the Americas, revealing that caimans dispersed north from South America by the early Miocene. The presence of fossils in Panama supports a recent hypothesis that Central and South America were closer together than previously thought.
A new feathered dinosaur fossil found in China's Jurassic period pushes back the known origins of birds, which were previously thought to have evolved from theropod dinosaurs around 120-130 million years ago. The discovery provides additional evidence for a more complex evolution of flight.
A new fossil discovery reveals a bird with specialized teeth for eating hard prey, greatly expanding the known diversity of tooth shape in early birds. The find suggests that dietary differences may have contributed to the decline of enantiornithine birds during the Cretaceous period.
Researchers have uncovered historic letters written by Edward Drinker Cope to geologist Robert T. Hill, shedding new light on the Texas connection to the Bone Wars. A newly translated German ode to a fossil also provides insight into the era's intense fossil collecting frenzy.
A second specimen of Ernanodon antelios sheds new light on the mysterious ancient mammal, revealing it was highly specialized for digging. The fossil skeleton provides key information about its habits, lifestyle, and affinities, resolving long-standing controversies in the scientific community.
A new fossil discovery solves the mystery of flatfish evolution, revealing a 50-million-year-old fossil fish named Heteronectes that shows an intermediate stage between most fish and specialized flatfish. The study provides evidence for the gradual evolution of flatfish anatomy.
The study of Acanthodes bronni, a 290-million-year-old fossil fish, sheds light on the evolution of early jawed vertebrates. The researchers found that the common ancestor of all jawed vertebrates resembled a shark, with features such as cartilaginous jaws and primitive sensory organs.
Researchers have reconstructed the giant prehistoric New Zealand penguin, Kairuku, from two separate fossils, providing new insights into its body shape and uniqueness. The reconstruction reveals a slender body, long flippers, and short legs, standing around 4-feet-2 inches tall.
A 247 million-year-old fossil from China has been reclassified as an archosaur, revealing that the bird and crocodile family trees split earlier than previously thought. The discovery provides new evidence for the evolution of archosaurs and sheds light on the origins of these dominant land vertebrates.
Researchers Wang and Chang have found Pliocene cyprinid fish fossils in the Kunlun Pass Basin, suggesting relatively extensive water systems in the area during the Pliocene. The study suggests a more humid climate and less amplitude of uplift compared to previous proposals.
Researchers from UF and Smithsonian Tropical Research Institute found a 60-million-year-old fossil of Cerrejonisuchus improcerus, an ancient crocodile relative that was likely preyed upon by Titanoboa. The study provides new insights into the diversity of ancient South American rainforest ecosystems.
A new study compares expert identification and computer analysis in reconstructing ancient fossils from hundreds of thousands of jumbled pieces. The research found that specialized experts provided the most reliable identifications, while less experienced palaeontologists made more mistakes.
The discovery of Suminia getmanovi, a small plant-eating synapsid, provides evidence that vertebrates took to trees early in Earth's evolution. The tree-climbing lifestyle offers access to new food resources and protection from ground-dwelling predators.
Researchers studied 35 ancient tetrapods to understand anatomical changes during the transition from fish to amphibians. They found that bones changed size at different rates, resulting in reshaping of body shape over time. This study supports the idea that modern amphibians evolved through paedomorphosis and miniaturization.
Researchers uncover jawbone of transitional fossil Megapiranha paranensis, showing intermediate pattern of teeth. The discovery confirms the evolutionary link between piranhas and their herbivorous relatives, with implications for understanding the piranha's distinctive bite.
A set of fossil teeth belonging to an ancient three-toed browsing horse, Anchitherium clarencei, has been discovered in the Panama Canal earthworks. The find supports earlier proposals that the habitat was a mosaic of dense forest and open woodlands, extending the southern range of this horse species.
A UBC paleontologist has solved the enigma of a massive bonebed in southern California by proposing that it formed over a 700,000 year time-span approximately 15 million years ago. The team found only five shark bite specimens out of over 3,000 bones and teeth analyzed, supporting the deposit-over-time theory.
A University of Florida study has resolved a long-standing debate in shark paleontology by concluding that modern great whites evolved from the broad-toothed mako shark. The preserved fossil, dating back 4-5 million years, features a complete jaw with intact teeth and vertebrae.
Researchers have discovered a 42- to 45-foot-long snake species called Titanoboa, which lived during the Paleocene Epoch and was larger than previously estimated. The discovery provides insights into the climate and ecosystems of tropical South America 60 million years ago.
Researchers found a colossal boa constrictor-like creature that stretched longer than a city bus and weighed over 1.25 tons, providing a rare window into past equatorial environment. The discovery suggests the mean annual temperature at equatorial South America during that time was nearly 33 Celsius, about six degrees warmer than today.