Articles tagged with Fossil Records
A new study describes a nearly complete bird skull from Antarctica, revealing insights into the early evolution of today's birds and avian diversity. The skull belongs to Vegavis iaai, an extinct duck-like bird that lived during the Late Cretaceous period.
Researchers suggest earliest dinosaurs emerged in hot, arid environments of low-latitude Gondwana, filling gaps in fossil record. This finding provides a potential origin for the iconic creatures, contradicting previous assumptions.
The Virginia Tech analysis extends the chart of life by nearly 1.5 billion years, mapping the rise and fall of ancient life from the Proterozoic Eon. The study reveals that global ice ages accelerated the pace of evolution in species counts.
A new species of flying reptiles, Melkamter pateko, has been discovered in the late Early Jurassic of Chubut province, Argentina. The find pushes back the origin of the advanced pterodactyloids by 15 million years, suggesting a more complex evolutionary history.
Researchers from UC Riverside have identified the oldest known ecdysozoan, Uncus dzaugisi, dating back to the Precambrian period. This discovery fills a significant gap in understanding the origins of this diverse animal group, which includes nematodes, arthropods, and scalidophora.
A new fossil mammal, Heleocola piceanus, has been discovered in Colorado, dating back to the Late Cretaceous period. The animal, estimated to weigh 2 pounds or more, is a rare find among mammals from this time period.
The painting in the La Belle France cave is believed to be the world's oldest known piece of paleo-art depicting an extinct mammal-like reptile called a dicynodont. The San people were engaging in palaeontology long before Western scientists, and their artwork provides compelling evidence of this.
The study found a recent reversal of fortunes in the Adriatic Sea, with populations of marine predators and their prey plummeting and being replaced by a single species. The researchers used seafloor environments to determine interactions between species, showing a decline in biodiversity and excess nutrients.
A new study reveals that Earth's surface temperature has varied more greatly over the past 485 million years than previously thought. The study, co-led by the Smithsonian and University of Arizona, confirms that carbon dioxide is strongly correlated with global temperatures across geological time.
Researchers have discovered a remarkably preserved fossil site in Massachusetts that provides a rare glimpse into terrestrial life from over 300 million years ago. The findings reveal a diverse ecosystem of early land-dwelling animals and plants, including some of the oldest known examples of their groups.
Scientists have discovered that some pterosaurs flew by flapping their wings while others soared like vultures. The new findings were made possible by the discovery of remarkably well-preserved fossils in Jordan, including a species with a five-meter wingspan and unique internal structures.
Scientists have discovered a new species of sauropod dinosaur, Qunkasaura pintiquiniestra, from the Cretaceous period in Spain. The fossil record reveals that Europe was home to both endemic and immigrant sauropods, challenging previous assumptions about regional isolation.
A team of experts discovered a dugongine sea cow attacked by an ancient crocodile and tiger shark, shedding light on prehistoric food chains. The fossils showed signs of both active predation and scavenging, providing new insights into the region's food chain networks during the Miocene epoch.
A team of sedimentologists and stratigraphers found that gap regularity, not incompleteness, determines evolutionary history reconstruction. Incompleteness can be overcome with geological knowledge, enabling accurate reconstruction of evolution hundreds of millions of years ago.
Researchers at Harvard University used confocal laser microscopy to examine ancient fossils of tardigrades, revealing a new species and confirming the existence of four previously unknown specimens. The study sheds light on the evolutionary history of tardigrades, including their ability to survive extreme conditions.
A new study has discovered the world's smallest adult arm bone, dating back 700,000 years, which provides crucial evidence on the evolution of Homo floresiensis. The fossil, found at Mata Menge in Indonesia, suggests that early humans were even smaller than previously thought.
A new timeline of early animal fossils links sea level changes to the emergence of bilaterian animals, which display symmetrical body plans. The study reconstructs environmental conditions during the Ediacaran-Cambrian interval and identifies gaps in the fossil record.
A 500-million-year-old fossil reveals the earliest known ancestors of modern molluscs were flat, armoured slugs covered in chitinous spines. These findings provide a unique window into early mollusc evolution and challenge current understanding of their origins.
A team of Harvard researchers has discovered a new species of chordate, Nuucichthys rhynchocephalus, in the Drumian Marjum Formation of the American Great Basin. The fossil provides valuable insights into early vertebrate evolution and biodiversity, as it is one of only four species documenting this stage of vertebrate lineage.
A new study from the University of Nebraska-Lincoln examines fossil records going back 66 million years, tracking changes in mammalian ecosystems and species diversity. The research reveals that following the mass extinction of non-avian dinosaurs, mammalian communities experienced a surge in functional diversity for 10 million years.
A new species of extinct crocodile relative, Benggwigwishingasuchus eremicarminis, has been discovered in Nevada, USA. The species reveals that pseudosuchian archosaurs ruled the shores across the Middle Triassic globe between 247.2 and 237 million years ago.
The newly discovered dinosaur Fona shares anatomical features with burrowing animals and has preserved fossils in a manner that suggests it spent time underground. The species' small size and fragile bones are often found in bundles, indicating that it likely buried itself to escape predators.
A new study using museum collections reveals that ammonites were diverse and thriving across the globe just before their extinction in the Late Cretaceous. The research found that the balance of speciation and extinction rates varied by region, contradicting previous theories.
Researchers found sharks maintained high levels of functional diversity for most of the Cenozoic era before declining over the last 10 million years. The decline is attributed to the loss of ecologically unique species, including the megalodon, a key apex predator.
The discovery of Helicolocellus fills a 160-million-year gap in the sponge fossil record and suggests non-biomineralizing sponges existed in the Precambrian. The study bridges the Ediacaran and Cambrian fossil assemblages, providing insights into animal evolution.
A team of researchers led by Virginia Tech's Shuhai Xiao discovered a 550 million-year-old sea sponge that challenges previous theories about its evolution. The fossil, found in China, suggests that early sponges may have had soft-bodied skeletons and only later developed mineralized structures.
A 6-centimeter-wide fossil of a large cat species, Homotherium, was discovered on the Texas coast. The fossil provided key evidence for the cat's expansion across habitats in Africa, Eurasia, and the Americas.
Australian researchers have identified a new species of ancient 'echidnapus', which exhibits platypus-like anatomy alongside echidna-like features. The discovery sheds light on the evolutionary history of monotremes, revealing six different egg-laying mammals living together in the same area over 100 million years ago.
New research reveals human activities alter marine organism preservation, improving or impairing the fossil record. Human actions can prevent useful information about ongoing changes and enhance the quality of the fossil record.
Ancient marine plankton communities showed subtle changes before major extinctions, serving as an early warning system for future ocean life loss. These findings offer new insight into how biodiversity responds to global warming and its relevance to worst-case scenarios.
Paleontologists have unearthed what may be the largest known marine reptile, a gigantic ichthyosaur measuring over 25 meters long. The fossilized remains of its second jawbone were found on a beach in Somerset, UK, and have been identified as belonging to a new species.
A new study by University of Alaska Fairbanks researchers challenges the long-held scientific principle that animals in high-latitude climates are larger than their relatives in warmer climates. The study found that Bergmann's rule applies only to a subset of homeothermic animals and ignores other climatic variables.
A new reconstruction of the 375-million-year-old fossil fish Tiktaalik reveals that its ribs likely attached to its pelvis, enabling support of the body and potentially leading to the evolution of walking. This discovery provides insights into the major evolutionary transition from fish to four-limbed vertebrates.
Researchers have discovered fossilized water striders in copulation, providing a rare glimpse into the mating behaviors of ancient insects. The study reveals strong sexual conflict between males and females, with males using specialized morphological adaptations to overcome female resistance.
Researchers found a 100-million-year-old endoparasitic marine tapeworm fossil in Kachin amber, providing new information on the early evolution of tapeworms. The discovery shows that amber can preserve internal structures of helminths like tapeworms, shedding light on their taphonomy.
Scientists have discovered a new species of aetosaur, a heavily armored cousin of modern crocodiles, with an intact armor suit. The suit, called a carapace, is about 70% complete and has unique features that distinguish it from other aetosaurs.
A new study quantifies the impact of great fossil sites on our understanding of evolutionary relationships between fossil groups, discovering that the Gobi Desert's well-preserved lizard record shapes understanding more than any other site. The study's findings highlight the importance of exceptional fossil preservation in shaping our ...
The discovery of fossilized trees with a surprising three-dimensional crown shape reveals that some ancient plants were experimenting with unusual growth forms to maximize light capture. The 350-million-year-old tree, known as Sanfordiacaulis, had over 250 leaves and a dense canopy extending at least 5.5 meters around its non-woody trunk.
A new study published in Palaeontologia Electronica shows the Megalodon was more slender than earlier studies suggested, changing our understanding of its behavior and impact on ancient ocean life. The revised model suggests a longer digestive canal, potentially leading to less predation pressure on other marine creatures.
Researchers establish a 400-million-year evolutionary history of euglenoids by comparing microfossil cysts from various time periods to living protists. The study resolves long-standing taxonomic confusion among fossilized remains, revealing a previously unknown ultrastructure.
New evidence reveals that giant ape species 'Gigantopithcus blacki' went extinct between 295,000 and 215,000 years ago due to its inability to adapt to changing climates and food preferences. The study used multiple dating techniques and environmental analysis to confirm the extinction timeline.
Researchers have identified the oldest thylakoid membranes, 1.2 billion years older than previously known, in 1.75 billion-year-old fossil cyanobacteria. This discovery provides a new approach to understand the early diversification of life and the role of cyanobacteria in the Great Oxygenation Event.
Researchers at Museums Victoria Research Institute uncover evidence that giant baleen whales evolved first in the Southern Hemisphere around 20 million years ago. This finding disrupts previous theories and highlights the importance of the Australian fossil record in shaping our understanding of whale evolution.
Researchers mapped crocodile family trees to shed light on their evolution and conservation. Climate change and competition played key roles in shaping modern-day crocodile diversity, with ecology being an unexpected factor in survival.
Yale paleontologists have identified a new fossil lizard, Helioscopus dickersonae, which suggests that gecko ancestors appeared in North America earlier than previously known. The discovery provides insights into the physical features of early geckos and their behavior, including their ability to climb trees.
Researchers discovered ancient bird-like footprints in Southern Africa that date back over 210 million years, 60 million years before the earliest known bird fossil. The tracks were found at multiple sites and show a mix of dinosaur and bird-like characteristics.
Researchers uncover 10 new trilobite species in Thai sanctuary, shedding light on Cambrian-Ordovician period and connecting Thailand to parts of Australia. The discovery helps date the age of fossils and better understand global geography.
A new study reveals that cycad species that survived the dinosaur extinction relied on symbiotic bacteria in their roots for nitrogen. This discovery sheds light on how these plants adapted to changing environments and could provide insights into understanding Earth's climate history.
Researchers have discovered a series of bird footprints from the Early Cretaceous period in Victoria, Australia, indicating that diverse birds lived in southern polar environments during this time. The discovery provides new insights into the distribution and dispersal of early birds across landmasses.
A newly described family of jewel wasps, Protoidae, has been found in Cretaceous amber from Lebanon, providing a unique snapshot of the group's early evolution. The discovery reveals striking characteristics, including a long, shovel-like process, which may have assisted with egg-laying and ovipositing.
A nearly intact fossilized bat skull discovered in a 50-million-year-old cave has provided crucial insights into the evolution of bats and their use of echolocation. The find, part of an analysis published in Current Biology, suggests that early bats may have used a form of echolocation similar to that employed by modern species.
The discovery of a complete Anachlysictis gracilis skeleton in Colombia provides new insights into the species' weight, estimated at around 23 kg, and diet as a hypercarnivore. The fossil's analysis suggests it preyed upon small mammals, such as marsupials and rodents, and possibly primates.
Researchers found preserved molecular fragments of the pigment phaeomelanin in 10-million-year-old frog fossils, which could help reconstruct ancient animal colors. This discovery may be a first step towards understanding the evolution of toxic phaeomelanin.
A new modeling method powered by interconnected processors removed human bias from the debate over dinosaurs' demise. The study suggests that the outpouring of climate-altering gases from the Deccan Traps alone could have been sufficient to trigger global extinction, consistent with volcanic eruptions contributing to the mass extinction.
A new sauropod dinosaur species, Garumbatitan morellensis, was discovered in the Iberian Peninsula. The fossil remains found in Sant Antoni de la Vespa exhibit unique characteristics, including a morphology similar to modern sauropods from the Late Cretaceous.
A new study reveals that long-lived lakes played a crucial role in the evolutionary history of freshwater snails. These ancient ecosystems allowed species to 'experiment' over millions of years, resulting in unique morphological changes and special ecological adaptations.
A 2020 excavation at Auckland's Mangere Wastewater Treatment Plant yielded an unprecedented 266 fossil species, including the world's oldest known flax snails and extinct sawshark spine. The discovery provides valuable insights into New Zealand's geological history.
Proeboscideans evolved tooth changes in response to vegetation changes and climate change in East Africa. The earliest true elephants developed highly specialized high-crowned molar teeth around 7 million years ago, adapted to grass-rich diets.
Two studies by UPV/EHU researchers analyze recent and past oceanographic information off the Basque coast based on microfauna present in sediments. The research found that planktonic foraminifera assemblages are good indicators of ocean currents and water masses reaching the Basque continental shelf today.
Fossil discoveries in northern Panama Canal area suggest that marine species interchange persisted across shallow waters during the final stages of formation of the isthmus. The findings provide new insights into the connectivity between the Pacific and Caribbean marine faunas during this period.