Articles tagged with Animal Fossils
A new species of hamster-sized mammal, Cimolodon desosai, has been discovered in the Upper Cretaceous El Gallo Formation of Baja California. The fossil, estimated to be 75 million years old, was found alongside dinosaur fossils and provides insights into the survival strategies of early mammals.
Researchers uncover 289 million-year-old mummy of lizard-like creature Captorhinus aguti, preserving skin, cartilage, and protein remnants. The find reveals the oldest example of costal breathing system in amniotes, shedding light on early reptile evolution.
A newly discovered fossil site in southwest China reveals that many key animal groups evolved before the start of the Cambrian Period. The study found fossils of ancestors of modern starfish, sea cucumbers, and chordates, pushing back the timeline of complex animal life by at least 4 million years.
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A previously unknown harvestman species has been found in Eocene amber deposits in Ukraine and the Baltic region. The fossil, named Balticolasma wunderlichi, reveals a highly ornamented body with lattice-like appendages and complex mouthparts, challenging current knowledge of species distribution.
A new study reveals that turtles surviving the Cretaceous-Paleogene extinction event largely relied on a diet of hard-shelled organisms. This ecological adaptation allowed them to thrive in environments where other species struggled to survive, with dietary specialization being a key factor in their survival.
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.
Scientists discovered a 4-meter-long Polycotylus fossil with a huge tooth embedded in its neck vertebrae, suggesting a violent attack by an enormous bony fish called Xiphactinus. The fossil's internal structure was analyzed using CT scanning, revealing a three-dimensional model of the tooth and its attacker.
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.
The discovery of Eosteus chongqingensis and Megamastax amblyodus provides a major breakthrough in understanding the evolution of bony fishes, revealing primitive characteristics that evolved much earlier than previously thought. These findings confirm South China as the cradle for the origin of jawed vertebrates.
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 nearly complete skeleton of Alnashetri cerropoliciensis has been discovered in Argentina, providing the first evidence of this enigmatic group of dinosaur. The fossil's age and anatomy reveal that these tiny animals existed when the continents were still connected as Pangaea.
Fossils from the Lower Triassic of Western Australia confirm a cryptic marine temnospondyl community, showing that earliest sea monsters adapted to life in the sea and radiated rapidly into various ecological niches. The discovery also reveals worldwide dispersal of these ancient animals across supercontinents.
Scientists discovered a 307-million-year-old fossil of an early land vertebrate that evolved to eat plants, challenging previous assumptions about the origins of herbivory. The 'tyrant digger' had tough teeth on its roof and probably ate smaller animals along with vegetation.
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.
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.
Researchers discovered fossilized bee nests in a Dominican Republic cave, containing pollen and matching modern bee nest structures. The nests, dated to around 20,000 years ago, were likely built by solitary bee species using saliva-dirt mixtures.
Researchers found a mosasaur tooth in North Dakota that revealed the giant reptile's ability to thrive in freshwater rivers. The study used isotope analyses to show that mosasaurs inhabited riverine environments in their final million years before extinction.
The discovery of a 66-million-year-old tooth in North Dakota, USA, reveals that mosasaurs may have hunted in freshwater environments as well as seas. The analysis of isotopes in the tooth's enamel suggests that the mosasaur preyed on freshwater animals and lived in a river-like area formerly connected to an ancient sea.
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.
A tiny fossil bird named Chromeornis funkyi has been discovered with a massive cluster of stones in its throat, suggesting it likely choked to death. The unusual find provides new insights into the evolution of dinosaurs and birds, revealing that this species may have died due to regurgitation of swallowed rocks.
A new paper published in Science reveals that Nanotyrannus is nearly fully grown and not an immature T. rex, while also providing insights into how giant predators achieved terrifying sizes quickly.
A University of Cambridge-led team analyzed giant anaconda fossils to determine their maximum size occurred 12.4 million years ago. The study found that ancient anacondas were four to five metres long, matching the size of modern anacondas, suggesting they have remained giants due to a suitable environment.
Researchers discovered a new 233-million-year-old nonflying relative of pterosaurs that provided breakthrough insights into the evolution of flight in these animals. The study found that pterosaurs evolved their own 'flight computers' from scratch, with unique brain structures and smaller brain sizes compared to birds.
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.
Researchers found over 800 vertebrate fossils from a small area, including dinosaurs and other prehistoric creatures. The discovery provides valuable insights into the evolution of European dinosaur faunas during the Late Cretaceous period.
Researchers have identified a tiny 'GPS' system in ancient magnetic fossils, suggesting that animals may have used the Earth's magnetic field to navigate long distances for at least 97 million years. The discovery provides direct evidence of magnetoreception and sheds light on how animals evolved this ability.
A recent study published in Science Bulletin has provided direct evidence for herbivory in pterosaurs, resolving a long-standing debate. Researchers discovered phytoliths and gastroliths in the stomach of Sinopterus, confirming its plant-based diet.
Researchers discovered a common parasite of modern oysters has been infecting bivalves for hundreds of millions of years. The parasite, belonging to the spionid group, has remained largely unchanged despite multiple mass extinction events.
A new fossil discovery confirms Nanotyrannus as a distinct species from Tyrannosaurus rex, challenging decades of research on T. rex growth. The fossil reveals that Nanotyrannus was physically mature at age 20 and had distinct skeletal features incompatible with T. rex.
Researchers used electron microscopy to investigate ammolite's structural properties, finding that the colors are caused by light reflecting off narrow gaps between aragonite plates. The findings could inform the development of non-fading colored paints.
Researchers have discovered a tiny foot bone in New Zealand that belongs to an extinct bird species with potentially unique courtship behaviors. The St Bathans bowerbird, found to be smaller than living species, has been given the name Aevipertidus gracilis.
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 new study explores why certain parts of reptiles, such as lizard jaws and snake vertebrae, are more likely to be preserved as fossils. The research reveals that physical characteristics like bone density and body size, as well as the environment in which the animals lived and died, are major predictors of fossil completeness.
A team from the University of Liège has developed equations to estimate the size of large marine reptiles from incomplete fossil skeletons. This allows for a better understanding of the evolution and ecology of these marine predators.
Two baby pterosaurs, aged less than 20 cm with broken wings, were found to have died from powerful storms that also preserved hundreds of other fossils. The discovery explains why smaller fossils are well-preserved, as they were a direct result of storms.
Researchers have uncovered a new species of bettong and two new subspecies of woylie in Western Australia, revealing vital clues about the diversity of these critically endangered marsupials. The discovery has significant implications for conservation efforts, including breeding and translocation initiatives.
Researchers discovered a 310-million-year-old fossilized ray-finned fish, Platysomus parvulus, which had a unique 'tongue bite' mechanism to devour prey. This ancient fish's internal anatomy revealed a sophisticated arrangement of tooth plates and gill skeleton, providing insights into the evolution of fish feeding strategies.
A tiny fossil of a sea creature from over half a billion years ago sheds light on the evolution of arthropods, revealing a brain similar to that of living crustaceans. The discovery suggests that the split between the two largest groups of arthropods was more nuanced and complicated than previously thought.
Scientists reconstructed the brain, heart, and fins of a 400-million-year-old fish called Norselaspis glacialis. The study found that its acute senses and powerful heart evolved well before jaws and teeth, suggesting a fast-swimming lifestyle was key to evading predators.
Fossilized dinosaur teeth contain oxygen isotopes that indicate high carbon dioxide levels in the atmosphere during the Mesozoic Era, which was four to three times higher than today. This data suggests dynamic climates with double primary plant production, contributing to their extinction.
The discovery of exceptionally preserved early animals in the Grand Canyon sheds new light on the evolution of life during the Cambrian period. The fossils, dating back 507-502 million years, reveal complex feeding styles and unique adaptations, including hair-like extensions on crustacean bodies.
A new analysis of a 500 million-year-old fossil suggests that arachnids, including spiders and scorpions, evolved in the ocean before adapting to land. The discovery was made by studying the brain and nervous system of an ancient marine arthropod called Mollisonia symmetrica.
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 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.
The discovery of thousands of animal bones at a remote garrison site in northeastern Mongolia sheds new light on the lives of soldiers and civilians who lived along the medieval Liao Empire's long wall. The analysis suggests a largely self-sufficient pastoral economy, with evidence of herding, hunting, fishing, and seasonal climate var...
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.
A nearly complete fossil of Westlothiana lizziae, a four-legged creature, has been dated to 346 million years ago, shedding new light on the evolution of amphibians, birds, reptiles, and mammals. This age places the specimens in Romer's Gap, a pivotal time period where water-dwelling fish transitioned to land animals.
A team of palaeontologists from Fundación Dinópolis has discovered a partial stegosaurian skull in Spain, revealing previously unknown aspects of the species' anatomy. The find has led to the proposal of a new evolutionary hypothesis and the definition of a new group called Neostegosauria.
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.
A group of elasmosaur fossils has been formally identified as belonging to a new genus, Traskasaura sandrae. This ancient marine reptile, measuring 12 meters long and having heavy, sharp teeth, likely hunted prey from above using its strong swimming capabilities.
New research from the University of Chicago reveals that dentine, the inner layer of teeth, first evolved as sensory tissue in ancient fish. Fossil studies confirm that early vertebrates used sensory organs in their armor to sense conditions in the water, similar to modern arthropods.
Researchers have made new discoveries about the ancient bird Archaeopteryx, including its ability to fly and its evolutionary history. The Chicago specimen, a well-preserved fossil found in Germany, provides insights into the species' cranial kinesis and soft tissues, challenging previous assumptions about its behavior.
A study by the University of Leicester has successfully linked fossilised footprints to distinct groups of pterosaurs, shedding light on their lifestyles and behaviors. The discovery supports the idea that pterosaurs underwent a major ecological shift during the middle part of the Mesozoic era.
A study from the University of Lausanne reveals that larger animals and those with higher protein content tend to create reducing conditions more rapidly, which slow down decay and trigger fossilization. This explains why some ancient fossils are dominated by arthropods and others remain lost to time.
A research team discovered fossilized teeth and vertebrae in the Dominican Republic, confirming that large, terrestrial predators like sebecids once inhabited the Caribbean. This finding supports the GAARlandia hypothesis, suggesting temporary land bridges allowed animals to travel between South America and the Caribbean.