Articles tagged with Paleobiology
Researchers have discovered a new species of extinct amphibian, the spadefoot toad Spea labreae, from La Brea Tar Pits. The discovery highlights the impact of climate change on species distribution and provides insights into ancient environmental conditions.
A study of ancient DNA from over 500 mammoth bones found that Ice Age humans selectively targeted female woolly mammoths, unlike the sex ratio among naturally occurring remains. The research sheds light on how ancient humans and mammoths interacted across the Late Pleistocene.
A team of international researchers has uncovered a unique fossil from China that preserves the digestive system of an ancient marine reptile. The study provides insight into the early adaptations of long-necked marine reptiles to life in the oceans, contradicting previous assumptions about their limited aquatic capabilities.
A new study found that massive wildfires occurred in fern-dominated landscapes across Northwest Europe during the Triassic period, lasting from 40,000 to 300,000 years. The research team used a novel technique to detect dark-colored microfossils, indicating prolonged and intense wildfires.
Researchers discovered that ancient organism Spriggina floundersi preferred to bend to the right, showing the oldest known example of lateralized behavior. This finding provides new insights into the origins of left-right asymmetry in animals and suggests that behavioral preferences emerged earlier in evolutionary history than previous...
Researchers discover fossilized baby early tetrapods, which skipped the tadpole metamorphosis previously thought. This finding upends scientists' understanding of how animals conquered the land, suggesting that early tetrapods were more like fish and birds than modern amphibians.
A new study on ancient genomes reveals that the extinct cave lion had a highly distinct evolutionary lineage, separating from modern lions over 1.5 million years ago. The research found evidence of interbreeding between cave and modern lions across tens of thousands of years, linked to past climate changes.
A research team discovered six modern fish groups, including jack, moonfish, and pipefish, dated to 62.2 million years ago, helping to fill a 10 million year gap in the fossil record. The findings suggest that certain fish groups likely went extinct at the end of the Cretaceous Period, while others were established early on.
Extraordinary fossils from China confirm that bryozoans were active participants in the Cambrian explosion. The fossils, preserved in three dimensions with soft tissues intact, provide definitive evidence of a bryozoan affinity and rewrite the timeline for the origin of this phylum.
Labrujasuchus expectatus, a bizarre creature with tiny arms and a toothless mouth, has been discovered in Ghost Ranch, New Mexico. The species fills the gap between two earlier shuvosaurs, providing insight into convergent evolution and the diversification of ancient animals.
Researchers describe Tylosaurus rex, a massive mosasaur with finely serrated teeth, from 80-million-year-old fossils found primarily in northern Texas. The new species is estimated to be around 43 feet long and had strong jaw and neck muscles suggesting it was a powerful predator.
Researchers analyzed bone collagen peptides from avian remains found at the Gungok-ri site in South Korea, identifying the presence of chickens and their management during the Proto-Three Kingdoms period. The study's findings provide insights into Korean food culture, agriculture, and animal domestication.
A Virginia Tech student's discovery of a rare, ancient meat-eating dinosaur sheds light on the evolution and spread of dinosaurs during the Jurassic period. The species, Ptychotherates bucculentus, had massive cheekbones and a short snout, indicating constant evolution in early dinosaurs.
A 289-million-year-old mummified reptile has provided scientists with a unique window into the evolution of breathing and movement in ancient reptiles. The study found that the reptile's respiratory system is similar to that of modern reptiles, birds, and mammals, suggesting an efficient mechanism for respiration.
A 500-million-year-old fossil reveals the earliest known chelicerate with a claw, pushing back the evolutionary history of chelicerates by 20 million years. This discovery sheds light on the assembly of the chelicerate body plan and their early ecological context.
The project brings together eight perspectives to develop tools for documentation, legal clarity and traceability, supporting lawful activity and enforcement.
Researchers discovered that 240-million-year-old coelacanths used their lung to detect sounds underwater, employing an ossified lung and a canal connecting the hearing organs. This finding provides valuable insight into the evolutionary history of these fish and may also reveal secrets about our own aquatic ancestors.
A team of paleontologists has uncovered fossilized remains of giant tortoises, armadillos, and other Ice Age animals in a Central Texas water cave. The discovery, published in Quaternary Research, provides new insights into the region's past environment and animal community.
Researchers analyzed the teeth of four European straight-tusked elephants, discovering they migrated up to 300km before reaching their final habitat. The study suggests organized hunting and cooperation between Neanderthals and the elephants.
A new study reveals that the ancient reptile Sonselasuchus, a relative of the crocodile, began life on four legs before learning to walk on two. The discovery was made by analyzing the proportions of the limb skeletons of different animals, suggesting that the creature's bipedal stance may have resulted from differential growth patterns.
Researchers have discovered that crocodiles' growth rates are flexible and change depending on environmental conditions, revealing new insights into their life history. The findings challenge traditional methods used to age dinosaurs, suggesting a reevaluation of how growth marks are interpreted.
The discovery of Tanyka's fossilized jawbone provides insights into the evolution of tetrapods. With its twisted jaw and sideways-facing teeth, Tanyka is a living fossil from an ancient lineage that thought had gone extinct.
The discovery of miniscule Purgatorius fossils in Colorado provides fresh insights into the evolution of the earliest-known relative of all primates. The find suggests that archaic primates originated in the north and spread southward, diversifying soon after the mass extinction at the end of the Cretaceous Period.
A new comprehensive study reveals that modern afforestation in Europe is contrary to the continent's long-term ecological trajectory. The study suggests that dense forests are a recent phenomenon and that current reforestation practices are on the wrong track, harming biodiversity.
The earliest known bird, Archaeopteryx, had unique mouth features such as oral papillae, tongue bones, and bill-tip organs. These structures suggest that early birds evolved specialized ways to find and digest food efficiently, which is key to flight. The discovery provides new criteria for identifying dinosaur fossils as birds.
Scientists successfully sequenced a woolly rhinoceros genome from a 14,400-year-old tissue sample found in an ancient wolf's stomach. The study reveals that the species likely died out due to rapid population collapse rather than gradual decline.
Researchers from OIST found that the Late Ordovician Mass Extinction drove an unprecedented richness of vertebrate life, with gnathostomes dominating all others. The study linked the mass extinction pulses to increased speciation after millions of years, highlighting their role in shaping the evolution of vertebrates.
A team of international scientists led by Dr M. Eleonora Rossi from the University of Bristol reconstructed sponge skeleton evolution, finding that spicules evolved independently in different groups. This discovery challenges previous estimates of sponge origin and sheds light on early animal diversification.
Researchers discovered metabolites in fossilized bones of animals that lived 1.3 to 3 million years ago, providing insights into their health, diets, and environments. The findings revealed warmer and wetter conditions compared to today.
Researchers at the University of Zurich examined fossil records worldwide and found a consistent pattern: young shark species are more likely to go extinct. This challenges the long-held assumption that older species are less vulnerable to extinction.
A new species of ancient sea cow has been discovered in Qatar, revealing that sea cows have shaped the Arabian Gulf's seagrass ecosystems for over 20 million years. The fossil site, Al Maszhabiya, yielded more than 170 different locations containing sea cow fossils.
Dinosaurs operated with a 'latchkey kid' approach, with young offspring independent and foraging alone after just a few months. This led to an increased number of functional species in dinosaur fossil communities compared to modern mammals.
Researchers used CT scans to study brain cavities in ancient reptiles and found that pterosaurs had relatively small brains compared to birds. The study suggests that flight evolved independently in these groups without requiring significant brain changes.
A team of international scientists reconstructed size evolution in ancient sharks using interdisciplinary analysis. The study revealed that modern sharks experimented with enormous body sizes much earlier in their evolutionary history than previously suspected.
A new study reveals that Dunkleosteus was an oddball among ancient armored fishes, with a cartilage-heavy skull and unexpected feeding behavior. The research places Dunkleosteus in proper evolutionary context, highlighting the diversity of arthrodire groups.
A team of scientists has discovered chemical evidence of ancient life in 3.3 billion-year-old rocks, doubling the window of time for detecting organic molecules that reveal information about original organisms. The study also found molecular signs of photosynthesis dating back over 800 million years earlier than previously documented.
Researchers have successfully isolated and sequenced RNA molecules from Ice Age woolly mammoths, providing new insights into the biology of extinct species. The study reveals that RNA can be preserved for nearly 40,000 years, offering a glimpse into the final moments of life.
Research found that sharks with specialized physiologies and ecological roles are most threatened with extinction. Losing these species would diminish trait diversity, leading to a more boring world with less diversity of forms. The study suggests that overfishing is the single biggest driver of shark population decline.
A 99-million-year-old fossil discovery sheds light on the evolutionary history of mosquitoes. The ancient larva shares modern species' morphology, challenging previous assumptions about their early evolution.
Researchers propose a new model for Earth's oxygenation, finding that high nickel and urea concentrations kept cyanobacterial blooms rare. As these compounds became available at lower levels, they drove the expansion of cyanobacteria, leading to long-term oxygen release and the Great Oxidation Event.
A 430-million-year-old fossil found in Wisconsin reveals that ancient leeches feasted on smaller marine creatures, challenging the assumption that they are bloodsuckers. The absence of a forward sucker in the fossil suggests a different early lifestyle for the group known as Hirudinida.
A 2023 MSU graduate's undergraduate research project uncovered a new, 95-million-year-old crocodyliform named Thikarisuchus xenodentes. This tiny creature lived on land, feasting on plants and insects, with unique teeth that shed light on ancient ecosystems and evolutionary patterns.
Researchers have uncovered microbial DNA in woolly and steppe mammoth remains dating back over 1 million years, identifying bacteria possibly causing disease in mammoths. The findings provide an unprecedented glimpse into the microbiomes of extinct megafauna.
Fossilized marine invertebrates accurately reflect past ecosystems' functional diversity, offering a powerful tool for understanding long-term ecological change and informing modern conservation efforts. The study supports the growing field of conservation paleobiology by validating the use of functional diversity metrics in fossil data.
New research reveals that ancient ocean oxygenation drove diversification among jawed vertebrates. The study found two oxygenation events occurred in deeper waters, one lasting from the Middle Devonian period to present, and suggests oxygen played a key role in shaping evolutionary patterns.
A new study tracks the evolution of marine sediment layers across hundreds of millions of years, revealing insights into bioturbation's impact on ocean habitability and ecology. Bioturbation played a critical role in shaping seafloor ecosystems and regulating nutrient cycling.
The Smithsonian Tropical Research Institute is digitizing images of pollen from over 18,000 plant species to create a massive database. This dataset will be used to train an AI model to aid pollen identifications, transforming the process into a digital and universally accessible one.
Researchers found that different species of dinosaurs had distinct preferences for plant parts, including leaves, buds, and woody tissues. This discovery helps explain how so many large herbivores coexisted in the same ecosystem without competing for resources.
Researchers at the University of Missouri have confirmed a more nuanced view of the Mazon Creek fossil site, using modern data analysis techniques to assess paleoenvironmental and taphonomic nature. The study reveals three identifiable paleoenvironments, including transitional habitats between nearshore and offshore zones.
A previously unknown genus and species of Pliocene mole, Vulcanoscaptor ninoti, has been identified in southern Europe. The fossil provides valuable insights into the evolutionary history of talpids and suggests past transcontinental migrations of moles.
Scientists reconstructed ocean pH levels 201 million years ago and found a massive drop in acidity, leading to mass extinction. The research links this event to volcanic activity and a significant increase in atmospheric CO2.
Researchers from Harvard University have discovered ancient proteins in the enamel of 18-million-year-old fossilized mammals from Kenya's Rift Valley. The study uses a new proteomics technique to reveal a diversity of proteins in different biological tissues, providing insights into the lives and evolution of these ancient animals.
A Smithsonian-led team has discovered North America's oldest known pterosaur, dating back to the late Triassic period around 209 million years ago. The fossilized jawbone of the new species was found alongside hundreds of other fossils, including a turtle with spike-like armor and an ancient frog relative.
A groundbreaking study of 7000-year-old fossilized coral reefs reveals that human fishing has transformed Caribbean reef food webs. Shark populations have declined by 75%, while prey fish species have doubled in abundance and grown 17% larger on modern reefs.
Stanford researchers measured biomass of ocean life over the past half-billion years, finding a generally increasing trend. The study aligns with evidence for a rise in marine biodiversity and suggests an evolutionary connection between biomass and biodiversity.
Researchers have uncovered a new species of Swaindelphys, a large metatherian that lived around 60 million years ago in Texas' Big Bend National Park. The species, dubbed Swaindelphys solastella, is significantly larger than similar species known from the same period.
Scientists have discovered fossils of multiple bird species in the Arctic, including diving birds and gull-like birds, that were breeding during the time of the dinosaurs. The findings push back the known record of birds nesting in polar regions by 25-30 million years.
New research finds megalodon preyed upon a variety of species, including fish, sharks, and even crustaceans, contrary to the long-held belief that it targeted large marine mammals. The discovery was made by analyzing zinc isotopes in fossilized teeth, providing insights into the prehistoric shark's ecological versatility.
Scientists have named a new species of fish from the Cretaceous Period, Sivulliusalmo alaskensis, which is the oldest salmonid in the fossil record. The discovery provides insight into the evolutionary history of the salmon family and suggests that they likely originated in the North.
Researchers found that ancient Homo sapiens used tailored clothing and ochre-based sunscreens to protect themselves from harmful UV light during the Laschamps excursion. This period of reduced magnetic field strength allowed more cosmic radiation to reach Earth's surface, potentially contributing to the decline of Neanderthals.