Articles tagged with Animal Fossils
Researchers have discovered that Dickinsonia fossils do not reveal all the features of the earliest known animals. The study suggests that simple physical properties of sediments can explain the preservation of these soft-bodied creatures.
Researchers have uncovered three new species and subspecies of ancient mammals that once roamed the Cayman Islands. These mammals, including large rodents and a shrew-like creature, are believed to have gone extinct due to human arrival and introduced species.
Researchers have discovered fossilized spider eyes with a reflective tapetum, enabling the ancient spiders to hunt at night. The unique preservation of these features in Korean shale has provided valuable insights into the biology and diversity of extinct spider families.
A study by Otago researcher Dr Carolina Loch and colleagues has shed new light on the evolution of modern baleen whales' ancestors, revealing complex enamel structures in their teeth. The research suggests that these ancestral whales had a mix of mammalian and whale-like characteristics.
A 180-million-year-old ichthyosaur fossil has yielded surprisingly well-preserved soft tissues, including skin that retains some of its original pliability. The study reveals the presence of blubber under the skin, similar to modern whales and sea turtles.
A new paper describes two fossil species of marsupials that lived on an island in the Pontide region of modern-day north-central Turkey during the Eocene. The study sheds light on how island ecosystems evolved over time, revealing that even unique biotas are doomed to extinction given enough time.
A 11.6-million-year-old fossil discovered in Can Mata landfill, Spain, has provided new insights into the origin and evolution of flying squirrels. The fossil, identified as Miopetaurista neogrivensis, suggests that giant flying squirrels existed even earlier than previously thought.
Scientists discovered that mammals' flexible shoulders played a crucial role in the evolution of their complex backbones. The study found that changes in shoulder structure occurred around 270 million years ago, leading to the development of different spine regions and ultimately contributing to mammal diversification.
Researchers have identified biomarkers in Dickinsonia fossils, confirming it as an early animal and challenging previous interpretations. The findings suggest complex organisms emerged over 542 million years ago, paving the way for the Cambrian explosion of life.
A new study led by Harvard University researchers finds that mammal spines have gained new regions during evolution, which enabled them to adapt to different environments. The research challenges the long-held idea that mammal-specific characteristics emerged from a single ancestral blueprint.
Scientists have discovered molecules of fat in an ancient fossil, confirming that animals existed on Earth 558 million years ago. The discovery of the strange creature Dickinsonia, which grew up to 1.4 meters in length, reveals a long-standing mystery about its true identity.
Researchers have found that ancient Ediacaran fossils, dating back to 570 million years ago, were part of complex ecological communities. These organisms, such as suspension feeders and filter feeders, competed for resources like modern animals.
Scientists have discovered a new species of lobopodian, an ancient relative of modern-day velvet worms, in 430 million-year-old Silurian rocks. The creature was fully three-dimensionally preserved and reconstructed using digital technology.
Researchers analyzed over 4,000 mosasaur fossil specimens to determine if quality impacts our understanding of past biodiversity. The study found that the rich fossil record provides an accurate picture of mosasaur diversity and evolutionary history despite variable completeness.
A nearly complete foot from Dikika, Ethiopia, exhibits ape-like foot characteristics that challenge the long-held assumption of bipedalism in A. afarensis. The discovery provides new insights into the evolution of bipedality and highlights the importance of juvenile specimens in understanding trait development.
Researchers at Case Western Reserve University and other universities have discovered two new species of extinct hoofed mammals known as litopterns from a site in Bolivia. The animals, dating back to the late Miocene epoch, provide insights into South America's rich diversity of living mammals.
Scientists have uncovered a new species of chancelloriid, an ancient group of spiny tube-shaped animals that lived during the Cambrian Period. The discovery provides fresh insights into the evolution of early animals, with the fossil resembling modern sponges in pattern of body growth.
Two new Ediacaran era fossil animals, Obamus coronatus and Attenborites janeae, have been discovered by a UC Riverside-led team. These soft-bodied creatures represent the dawn of animal life and were named after President Barack Obama and Sir David Attenborough, respectively.
Scientists have discovered a 99-million-year-old featherwing beetle preserved in amber, named 'Jason'. The beetle has been found to have unique features not seen in modern featherwings, but also shares many similarities with its living relatives.
The discovery of ancient tetrapod fossils in South Africa suggests that four-limbed animals evolved in environments beyond tropical regions. The presence of these animals near the poles raises questions about the role of high-latitude environments in their evolutionary transition.
Researchers discovered fossil footprints for animal appendages in the Ediacaran Period in South China, revealing evidence of early animal life. The trackways indicate that bilaterian animals with paired appendages existed during this period, raising questions about their evolutionary origins.
A newly discovered 180-million-year-old Jurassic fossil has identified a missing link between two distinct families of prehistoric crocodiles. The Magyarosuchus fitosi specimen, featuring a large portion of its backbone, suggests that it is an intermediate form between the armoured and unarmoured groups.
Scientists have quantified sea temperatures in ancient oceans using fossil data and climate models. The research reveals high-latitude seas were around 20-25°C, similar to recent greenhouse climates.
A fossilized monitor lizard from the Cretaceous period was found to have a fourth eye-like structure, consisting of both pineal and parapineal organs. This discovery confirms that the third eye in lizards evolved independently of other vertebrate groups.
A new insect fossil discovery highlights a striking resemblance between Canadian and Russian fossils from the same age period, further solidifying an ancient connection between the two regions. The similarity is remarkable, with only the wing color distinguishing the two species, Eomerope eonearctica and Eomerope asiatica.
Researchers followed decomposing carcasses to better understand fossil formation, revealing incomplete remains and distorted life histories. This study helps create accurate pictures of ancient animals and ecosystems.
A new study describes a 5.5-million-year-old fossil turtle species from eastern Tennessee, revealing important differences between this species and others. The discovery provides insight into the evolution of turtles, suggesting that many ancient slider species died out without leaving direct descendants.
Researchers at Yale University have discovered a mineral signature that enables them to predict the presence of rare, soft-tissue preserving fossils. The study found that rocks rich in berthierine are more likely to contain Burgess Shale-type fossils.
Scientists have found that rocks rich in the mineral berthierine, a toxic to decay bacteria, are more likely to preserve soft tissue fossils. This discovery provides a mineralogical signature to find exceptional fossils and potentially supports the search for life on other planets.
A team of Uppsala researchers discovered a wealth of previously unknown microscopic animal fossils in Greenland rocks, dating back over half a billion years. The finds reveal a diverse array of soft-bodied organisms that likely made up the majority of ancient ecosystems.
A newly discovered fossil, Jablonskipora kidwellae, fills the missing evolutionary link in the history of bryozoans. The tiny marine creature lived 105 million years ago and evolved a unique structure to tap into flowing water, giving it a competitive advantage over other species.
A new species of stalked filter feeder has been discovered in the Cambrian Spence Shale in Utah, dating back 500 million years. The ancient creature, named Siphusauctum lloydguntheri, features a unique tulip-shaped body and variations in its digestive tract compared to similar known species.
A 35-million-year-old salamander fossil from France has yielded a unique glimpse into the life of an ancient creature. Researchers have successfully imaged the internal anatomy of the specimen using advanced x-ray imaging techniques, revealing that it fed on frogs - a rare food source for salamanders.
Researchers have discovered a new type of glycan that survives in 4 million-year-old animal fossils from Kenya. This breakthrough could reveal human origins and diet, including the consumption of red meat. Gc-CS detection may classify ancient hominin fossils into two groups.
A team of scientists discovered half-a-billion-year-old fossils in Brazil that reveal the existence of complex animals with muscle control approximately 550 million years ago. These findings challenge current fossil records and provide new insights into animal evolution.
A potential Miocene-era breeding site of the extinct baleen whale Parietobalaena yamaokai has been identified in Hiroshima, Japan. The discovery suggests that the northern hemisphere may have supported a breeding ground for this species dating back over 15 million years.
A new species of giant crocodile relative, named Razanandrongobe sakalavae, has been discovered in the Middle Jurassic of Madagascar. The fossilized remains of this prehistoric creature reveal massive jaw bones and serrated teeth similar to those of a T. rex, indicating that it was a formidable predator.
A rare fossil of Eusaurosphargis dalsassoi has revealed the animal's complete skeleton, providing a clear idea of its anatomy and probable lifestyle. The species is thought to have been adapted for life on land, contradicting earlier assumptions that it was aquatic.
A new fossil discovery challenges our understanding of the early evolution of tetrapods, revealing a fish-like creature with a snake-like exterior. The Lethiscus stocki fossil shows immediate and dramatic evolutionary experimentation, dropping its position on the 'family tree' and impacting evolutionary biology.
Researchers discovered two ancient fossils from the Triassic Period that connect Kermit the Frog's relatives to wormlike creatures with sharp teeth. These findings expand the history of modern amphibians by 15 million years, closing a major gap in early caecilian evolution.
The study suggests that animal phyla emerged rapidly around 700 million years ago, prior to the global Ice Age. The earliest known animal fossils exhibit complex morphologies, indicating animals originated before the Cambrian Period. New molecular-clock analysis produces a new estimate for the ages of the oldest animal groups.
Fossil evidence reveals a previously unknown east-west migration route for some mammals across North America, challenging previous hypotheses. Researchers propose that sea otters and potentially other animals traversed the northern edge of the Trans-Mexican Volcanic Belt to reach California from Florida.
New fossil finds from the Jebel Irhoud site in Morocco provide evidence that human ancestors ate a diet rich in game, including gazelle and wildebeest. The discovery pushes back the origins of Homo sapiens by 100,000 years to around 300,000 years ago.
Researchers from the University of Bristol found that a recently developed molecular clock method called RelTime failed to relax the clock, sparking debate on the age of animals. The team's findings suggest that animals are unlikely to be older than approximately 850 million years, in agreement with previous studies.
Researchers discovered the oldest known evidence of Homo at Ledi-Geraru, dated to 2.8 million years ago, with early Homo associated with open and arid grassy environments. The diet of early Homo appears similar to that of Australopithecus, challenging previous assumptions about the origins of Homo.
The Weng'an Biota fossils, once thought to be among the world's oldest evidence of animal life, may actually belong to other groups like algae. Researchers have found that characteristics previously used to define animals are not unique to them, leaving room for alternative identifications.
The discovery of three new species and insights into a fourth indicates the Palaeothentidae family was diverse and widespread across South America as recently as 13 million years ago. The findings complicate existing theories about their extinction, suggesting it may not have been a slow process.
Researchers have re-evaluated and re-classified Diandongosuchus fuyuanensis, a reptile previously labeled as a poposauroid, linking it to the phytosaurs. The fossil's shape reveals its connection to this extinct group of semi-aquatic reptiles that lived during the Triassic Period.
Scientists have discovered a 430 million-year-old crustacean fossil, named Cascolus ravitis, in recognition of Sir David Attenborough's contributions to natural history. The exceptionally well-preserved fossil reveals details about the animal's body plan, limbs, and respiratory-circulatory physiology.
A new study confirms the existence of 'living fossils' by measuring evolutionary rates in the tuatara, a reptile that has remained relatively unchanged for millions of years. The research found that the tuatara's anatomy is remarkably conservative and shows slow evolution compared to its fossil relatives.
A remarkable 250 million-year-old fossil found in China shows an embryo inside the mother, providing clear evidence for live birth. The discovery rewrites the understanding of reproductive evolution in a wide group containing birds, crocodilians, dinosaurs, and pterosaurs.
A new study by CSIC researchers reveals that environmental factors were the primary driver of horse diversification over 20 million years. The team found that newly evolved species were ecologically similar, with external factors such as ecosystem fragmentation and energy availability playing a key role.
Scientists have discovered a new species of 'unfossilizable' loriciferans, a type of animal so small it was considered impossible to find fossils of. The fossils date back to the late Cambrian Period, around half a billion years ago, and provide insight into early animal evolution and ecosystem diversity.
A new species of bird, Tingmiatornis arctica, has been discovered in the Canadian Arctic, dating back to approximately 90 million years ago. The fossil finds reveal a hyper-warm interval during the late Cretaceous period, with conditions allowing large birds to thrive.
Fossils previously thought to be generic carnivorans are identified as earliest known members of the beardog family, offering a clearer picture of the species' phylogeny. The research reveals that beardogs may have originated in parts of what is now the southwestern U.S.
Researchers found that 360-million-year-old Acanthostega fossils were immature individuals, indicating a possible aquatic juvenile stage. The study also revealed differences in limb ossification and size variation between individuals, suggesting potential adaptations for life on land.
Scientists have found fossil evidence of cannibalism among 300-million-year-old Orthacanthus sharks. The ancient predators used coastal swamps as nurseries for their babies before turning on them when resources became scarce.
A new study by the University of Leicester has identified details in fossil vertebrate eyes that shed light on how vertebrates evolved their complex eyes. The research shows that ancient species of hagfish could see, while living counterparts are blind, revealing a 'reverse evolution' process.
New fossil discoveries from the Ediacaran Doushantuo formation in South China reveal embryonic features similar to those of living animals. The fossils display unique structures preserved through discoidal cleavage, supporting the conclusion that animal lineages evolved by the mid-Ediacaran period.
The end-Ediacaran extinction, 540 million years ago, was triggered by ecosystem engineers - newly evolved organisms altering the environment, leading to the demise of older species. Fossil evidence found in Namibia preserves a mixed community of Ediacarans and animals, providing key insights into their interaction.