• The evolution of mammalian auditory ossicles was an evolutionary process that resulted in the formation of the bones of the mammalian middle ear. (wikipedia.org)
  • The vertebrate fossil localities of the Chorora Formation, Ethiopia, comprise one of only a few sub-Saharan African paleontological research areas that illuminate Late Miocene African mammalian and primate evolution. (elsevierpure.com)
  • The leading theory of the evolution of megabats has been determined primarily by genetic data, as the fossil record for this family is the most fragmented of all bats. (wikipedia.org)
  • Mammalian evolution at the base of the tribosphenidan radiation was complex, and this underscores the need for caution when interpreting the morphology and relationships of taxa known by incomplete material. (bioone.org)
  • Journal of Mammalian Evolution 18: 57-69. (asu.edu)
  • He thinks genetic clocks fail to account for the post-Cretaceous burst of mammalian evolution. (uncommondescent.com)
  • Today, paleontologists from the University of Kansas and the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing have published evidence in the Journal of Human Evolution shedding light on the long-standing saga of Ekgmowechashala, based on fossil teeth and jaws found in both Nebraska and China. (eurekalert.org)
  • The Chinese fossil discovery resolves the mystery of Ekgmowechashala's presence in North America, showing it was an immigrant rather than the product of local evolution. (eurekalert.org)
  • Their study was published in May in the Journal of Mammalian Evolution . (opb.org)
  • According to a study published in the Journal of Mammalian Evolution in June, opossums originated in the north of South America, where they diversified over the next three quarters of their evolutionary history. (fapesp.br)
  • While the History special is dubbed The Link, implying the fossil is a so called "missing link" in human evolution, many science journalists have criticized that interpretation, arguing that there cannot be a single "missing link" and that at best the fossil adds to the already strong literature on human evolution, and at worst may not be a part of humanity's evolutionary history at all. (nationalgeographic.com)
  • Mammalian faunas during the Cretaceous document the rapid, global diversification of tribosphenic mammals (sensu McKenna 1975 ). (bioone.org)
  • The journal also accepts submissions on sub-fossil or recently extinct mammals. (degruyter.com)
  • Here, we use fossils of distal humeri from well-sampled and well-studied localities in eastern Montana to document richness, body size, and locomotor patterns among latest Cretaceous and earliest Paleogene mammals. (palaeo-electronica.org)
  • Mammalian fossil exhibits at the Smithsonian claim that humans and all mammals descended from the "first mammal," perhaps Morganucodon. (evolutionnews.org)
  • The vast majority of these fossils - about 63.4 percent of identified bones - are from mammals, and of these more than 79 percent are the remains of carnivores. (scientificamerican.com)
  • About 50 mammalian species, approximately half of them extinct, are represented among the fossil bones. (britannica.com)
  • The platypus and four echidna species are the sole surviving mammalian egg-layers. (biologicaldiversity.org)
  • Often called "living fossils," these species capture scientific and public interest by showing us the vestiges of an earlier world. (frontiersin.org)
  • If living fossils are defined by a holistic pattern of low evolutionary rates or stasis, however, then classifying a species as a living fossil involves the application of sophisticated norms of scientific evidence. (frontiersin.org)
  • As Lidgard and Love point out, "when focused on either molecular or morphological characters that serve as proxies for species or lineages, there are rampant part-whole ambiguities in evaluating evolutionary stasis and change, many of which bear directly on controversies about categorizing living fossils" ( Lidgard and Love, 2018 , p. 762). (frontiersin.org)
  • New and more nearly complete specimens of mammalian species and their close kin reveal that they had expanded into ecological niches beyond the forest floor. (sciencenews.org)
  • With this tool, the researchers recorded traits-characteristics like the presence or absence of wings, type of hair cover, and brain structures-for 86 placental mammal species, including 40 species known only from fossils. (amnh.org)
  • The image is part of a mural of the Rattlesnake Formation of Central Oregon, where fossils of the newly identified feline species have been found. (opb.org)
  • Scientists only recently identified the fossils as a new species. (opb.org)
  • But it would be decades before anyone realized the fossils came from a previously unnamed species of prehistoric cat. (opb.org)
  • Based on fossil analyses and the geographical and temporal distribution of living and extinct species of the didelphidae family, commonly known as opossums, Mariela Castro, a biologist from the Federal University of Catalão (UFCAT) in Goiás, and her colleagues presented evidence that this group of marsupials first emerged in the Amazon approximately 40 million years ago. (fapesp.br)
  • The Cretaceous-Paleogene (K-Pg) mass extinction was a watershed event in mammalian evolutionary history. (palaeo-electronica.org)
  • Unlike whales or dolphins (Cetacea), the earliest evolutionary history of sirenians is poorly documented, and limited to a few fossils including skulls and skeletons of two genera composing the stem family of Prorastomidae ( Prorastomus and Pezosiren ). (plos.org)
  • The new Chorora Formation fossils include the earliest known records of Cercopithecinae, Hippopotaminae, and Leporidae in Africa. (elsevierpure.com)
  • Since then, the fossil, which could be the earliest known mammalian ancestor of man, linking Anthropoids (a group which include humans) with earlier groups of primates, has been extensively covered in the media. (nationalgeographic.com)
  • The transition between the "reptilian" jaw and the "mammalian" middle ear was not bridged in the fossil record until the 1950s with the elaboration of such fossils as the now-famous Morganucodon. (wikipedia.org)
  • Looking across the fossil record, we can trace when our proto-mammal ancestors actually lost those muscles. (sciencedaily.com)
  • Scientists have identified a fossil of an herbivorous dinosaur, Psittacosaurus , being bitten by a mammal, Repenomamus . (wlrh.org)
  • In the case of this particular fossil that was unearthed in modern-day northeast China, "this mammal appears to have been particularly gutsy or voracious," Mallon says. (wlrh.org)
  • Abstract The Middle Jurassic witnessed the early diversification of mammal groups, including the stem-mammalian clade, Docodonta. (palass.org)
  • Future demineralization assays should therefore focus on non-mammalian specimens from the Cenozoic and Jurassic-and-older nondinosaurian specimens, especially those preserved in less-common depositional environments (e.g., eolian settings). (lu.se)
  • If the ancestors of New World monkeys or Ucayalipithecus had spread through Europe and island-hopped to North America before heading south, or if they had taken the southern route via Antarctica, there would be a fossil trail of related primates in these places. (smithsonianmag.com)
  • In the 1990s, Rust's doctoral adviser and co-author Chris Beard, KU Foundation Distinguished Professor and senior curator of vertebrate paleontology, collected fossils from the Nadu Formation in the Baise Basin in Guangxi, China, that closely resembled the Ekgmowechashala material known from North America. (eurekalert.org)
  • Here in KU's collection, we have some critical fossils, including what is still by far the best upper molar of Ekgmowechashala known from North America. (eurekalert.org)
  • Orcutt and Calede determined that Machairodus lahayishupup lived in North America, as well as Europe, Asia, and Africa, but the largest concentration of those fossils, as well as the best preserved and most impressive, are from northeast Oregon on traditional Cayuse lands. (opb.org)
  • The mammalian jaw joint is composed of different skull bones, including the dentary (the lower jaw bone which carries the teeth) and the squamosal (another small skull bone). (wikipedia.org)
  • The mammalian middle ear contains three tiny bones known as the ossicles: malleus, incus, and stapes. (wikipedia.org)
  • It's only when we look into the details of the teeth, crania, and long bones that we see there are important differences," he notes, with the arrangement of bumps and troughs on the teeth acting as a reliable guide to which fossil belonged to which family. (smithsonianmag.com)
  • Often, a fossil is a pile of scattered bones. (wlrh.org)
  • Demineralization assays, utilizing weak acids to isolate organics from biomineralized tissues, have recently been applied with increasing frequency to explore soft tissue preservation in fossils, revealing frequent retention of cells and other pliable microstructures in fossil bones. (lu.se)
  • Osteocytes, blood vessels, and fibrous/proteinaceous matrix each exhibit bimodal recovery patterns in which most fossil bones either yield many or none of these microstructures. (lu.se)
  • Although these findings hint at possible controls on cellular and soft tissue preservation in fossil bones, they should be viewed cautiously as they are demonstrably biased by uneven sampling. (lu.se)
  • The scientists believe the cat was an ambush predator and a relative of the celebrated saber-toothed cat Smilodon , the famous fossil found in the La Brea Tar Pits in California. (opb.org)
  • Smilodon fossils from Talara at the Royal Ontario Museum. (scientificamerican.com)
  • Field work at Chorora since 2007 has resulted in the establishment of new vertebrate fossil localities and a revised chronostratigraphic framework. (elsevierpure.com)
  • While teeth may be small, they are often crucial pieces of the mammalian fossil record. (smithsonianmag.com)
  • Humerus size data imply a decrease in body size across the K-Pg boundary, followed by an increase by the late Puercan, a trend consistent with the dental fossil record. (palaeo-electronica.org)
  • Most surprising was the observation that the NSM accurately predicts the maximum mammalian body size observed in the fossil record," explains Yeakel. (santafe.edu)
  • New Science Uprising Episode Asks, "Just How Bad Is the Fossil Record for Darwin's Theory? (evolutionnews.org)
  • The fossil record is not a good match with Darwinian thinking, but it makes a strong pairing with intelligent design. (evolutionnews.org)
  • The mammalian record is notably enriched with well-preserved fossils, and we don't want to build trees without using the direct evidence that these fossils contribute. (amnh.org)
  • So far, the historical biogeography of early Sirenia has remained obscure given this paradox between phylogeny and fossil record. (plos.org)
  • Sirenia include the living manatees and dugongs, but the widespread and rich fossil record of this order testify to its outstanding past successfulness [1] . (plos.org)
  • But the timing and appearance of this primate in the North American fossil record are quite unusual. (eurekalert.org)
  • It appears suddenly in the fossil record of the Great Plains more than 4 million years after the extinction of all other North American primates, which occurred around 34 million years ago. (eurekalert.org)
  • In the course of the work, Rust was able to draw conclusions about how Ekgmowechashala came to be discovered in Nebraska, millions of years after its fellow primates died out in the continent's fossil record. (eurekalert.org)
  • It's rare for a fossil to record a behavior like this because a behavior, unlike a bone, tends to leave no trace. (wlrh.org)
  • Paleontologists crossing the Rio Yurúa in Amazonian Perú, with the Santa Rosa fossil site in the background. (smithsonianmag.com)
  • This project focuses on a very distinctive fossil primate known to paleontologists since the 1960s," said lead author Kathleen Rust, a doctoral candidate in paleontology at KU's Biodiversity Institute and Natural History Museum. (eurekalert.org)
  • Important mammalian megafauna bone beds are located in Nebraska's Agate Fossil Beds National Monument (Agate Fossil Beds) and Cita Canyon, Texas. (creationresearch.org)
  • A single molar can be more useful in identifying a fossil than a set of ribs or a leg bone. (smithsonianmag.com)
  • The fossil seemed impossibly black, tooth and bone stained to gorgeous ebony shades. (scientificamerican.com)
  • Though their relative abundances in any given fossil bone are extremely variable, statistically significant Fisher's Exact tests found that if a bone yields one of these types of microstructures in abundance then the others are usually also abundant. (lu.se)
  • Schweitzer, Mary H. / A STATISTICAL META-ANALYSIS OF LITHOLOGIC AND OTHER POTENTIAL CONTROLS ON FOSSIL BONE CELLULAR AND SOFT TISSUE PRESERVATION . (lu.se)
  • A fossil find in Peru suggests that a different, entirely extinct family of primates undertook the same kind of oceanic voyage more than 30 million years ago. (smithsonianmag.com)
  • After early descriptions and fossil sorting by Charles Churcher and others in the 1960s, the fossils waited in the Royal Ontario Museum collections for a more recent surge of interest that is beginning to trickle out some new details about this sticky Pleistocene bonanza. (scientificamerican.com)
  • 2011. Reed, K. E. and Bibi, F. Fossil Tragelaphini (Artiodactyla: Bovidae) from the late Pliocene Hadar Formation, Afar Regional State, Ethiopia. (asu.edu)
  • The lack of comparable primate fossils in other parts of the world helps to cement the case. (smithsonianmag.com)
  • The discovery of the link in homology between the reptilian jaw joint and mammalian malleus and incus is considered an important milestone in the history of comparative anatomy. (wikipedia.org)
  • The net effect of this impedance matching is to greatly increase the overall sensitivity and upper frequency limits of mammalian hearing, as compared to reptilian hearing. (wikipedia.org)
  • There are animals with a mixture of mammalian and reptilian features, such as echidnas , and there are fossils with a mixture of bird and reptilian features, such as the toothy archaeopteryx . (newscientist.com)
  • Are palaeontologists missing fossils, or do bursts of evolutionary diversification throw off molecular clocks? (uncommondescent.com)
  • Described today in Science , the key fossils are a set of four teeth. (smithsonianmag.com)
  • More temporally and taxonomically comprehensive research has been limited by low sample sizes of postcranial fossils, which is likely a function of the rarity of these elements (and extreme rarity of skeletons) relative to the thousands of mammalian teeth known from these deposits (e.g. (palaeo-electronica.org)
  • In the fossil, one of the mammal's paws grabs the dinosaur's lower jaw (left), another paw grips a hind leg (right), and its teeth sink into the dinosaur's ribcage (center). (wlrh.org)
  • Fossils of the massive feline were found in the 1950s on ancestral Weyíiletpuu (the name for Cayuse people in the Nez Perce language they later adopted) lands in today's eastern Oregon, where the cat shared the earth with giant camels and giant sloths five to nine million years ago. (opb.org)
  • The Lapara Creek Fauna is the youngest of a series of stratigraphically superposed vertebreate fossil localities in southern Texas that range from the Arikareean to the Clarendonian (Tedford et al. (ufl.edu)
  • That seems quite high compared to La Brea and Ice Age fossil sites in Florida, and could indicate that either there were more juveniles around at the time the Talara tar seeps were active or that the young animals were more naive and blundered into the trap more often. (scientificamerican.com)
  • Using examples from Crocodilia and the tuatara ( Sphenodon punctatus ), I show how scientists' evidential criteria for classifying living fossils are contentious and underspecified in many cases, threatening the concept's explanatory interest and its adequacy for sustaining a collective problem agenda as proposed by Scott Lidgard and Alan Love. (frontiersin.org)
  • Mammalia is an international, multidisciplinary, bimonthly journal devoted to the inventory, analysis and interpretation of mammalian diversity. (degruyter.com)
  • Our understanding of the emergence of this ecological diversity is hindered by a lack of Middle Jurassic fossil material from other parts of the world. (palass.org)
  • A remarkable new fossil, originating in the early Cretaceous some 125 million years ago and now described in the journal Scientific Reports , also supports this shifting view. (wlrh.org)
  • Method to detect signs of tooth replacement can also aid in identification of snake fossils in the future, even from isolated jaws. (kcl.ac.uk)
  • I focus in particular on the idea that living fossils in some sense represent extreme cases of slow evolutionary change, which connects them to broader debates in evolutionary biology about the nature and frequency of different evolutionary rates. (frontiersin.org)
  • Other features are required when classifying fossils, since mammary glands and other soft-tissue features are not visible in fossils. (wikipedia.org)
  • New analysis of fossils has provided evidence of mammalian origins 20 million years earlier than previously thought. (kcl.ac.uk)
  • Fossil evidence and the origin of bats. (morphobank.org)
  • Altogether, this work was found to be of substantial interest as it provides pioneering evidence that mammalian systems may be permissive to the restoration of essential amino acid biosynthetic pathways and is thus anticipated to have a broad impact in the fields of synthetic biology, biotechnology and beyond. (elifesciences.org)
  • Surprisingly, these fossils come from the Eocene of Jamaica, while stem Hyracoidea and Proboscidea - the putative sister-groups to Sirenia - are recorded in Africa as early as the Late Paleocene. (plos.org)
  • This fossil represents the oldest occurrence of sirenians in Africa. (plos.org)
  • The beautiful fossil had been excavated decades before from a tar seep in Talara, Peru. (scientificamerican.com)
  • At that time the mammalian lineage was adapting to dig and to live in burrows. (sciencedaily.com)
  • What he meant is that the progression over time seen in the millions of fossils unearthed around the world is exactly what evolutionary theory predicts. (newscientist.com)
  • A few years back, as I ran around the Royal Ontario Museum fossil halls trying to take in as much as I could in the short time I had there, an Ice Age fossil stopped me in my tracks. (scientificamerican.com)
  • And when I giddily started pulling open cabinets in the ROM collections on my second day at the museum, Seymour was kind enough to point out a stunning fossil jaguar skull that had previously been mistaken for an American lion. (scientificamerican.com)
  • Perhaps because, aside from being the most important fossil site on the planet, La Brea translates directly to "the tar. (scientificamerican.com)
  • The most important fossil ever ever ever can't compete with a screwed up family, I guess. (nationalgeographic.com)
  • On the banks of Río Yurúa, close to the border of Peru and Brazil, University of Southern California paleontologist Erik Seiffert documented a fossil site that contains a mix of the strange and familiar. (smithsonianmag.com)
  • Drying screen-washed sediment near the Santa Rosa fossil site. (smithsonianmag.com)
  • Located in the Cumberland County of Nova Scotia, the famous Joggins fossil cliffs entered the World Heritage Site list in 2008. (marineinsight.com)
  • I take the purpose of having a shared evidential framework, then, to be guiding productive, intersubjectively reliable research on living fossils when so little about their defining features and proper methods of study are settled as common knowledge. (frontiersin.org)
  • Such data include features preserved in fossils where DNA recovery may be impossible. (amnh.org)
  • However, no animals have a mixture of mammalian and bird features. (newscientist.com)
  • The Link, a History special about the recently revealed 47 million year old fossil Ida, drew 2 million viewers Monday night, according to Nielsen Fast Cable ratings. (nationalgeographic.com)
  • But a recent flurry of fossil finds is giving lie to that image. (sciencenews.org)
  • UW News featured a press release about a recent fossil discovery that impacts how we view mammalian reproduction . (washington.edu)
  • The largest of the seven Machairodus lahayishupup arm fossils available for the analysis was more than 18 inches long and nearly two inches in diameter. (opb.org)
  • The first Machairodus lahayishupup fossils were found in 1959 near McKay Reservoir between Pendleton and Pilot Rock. (opb.org)
  • This is the 﫿rst book to appear which correlates within a single volume the relevant data for both archeological and geological dating of human fossil remains. (krainaksiazek.pl)
  • Clearly if the first fossil amphibians were older than the first fossil fish, it would show that amphibians could not have evolved from fish. (newscientist.com)
  • To this end, I formulate a view of the living fossil concept as an investigative kind, and compare two theoretical frameworks as a basis for shared evidential norms: the Zero Force Evolutionary Law framework, introduced by Daniel McShea and Robert Brandon, and the statistical model selection framework first developed by Gene Hunt in the 2000s. (frontiersin.org)
  • The Museum am Löwentor was purpose-built to accommodate the internationally significant fossil collection, and opened its doors in 1985. (naturkundemuseum-bw.de)
  • The high disparity of the mammalian autopod, reported here, is consistent with the higher potential of development to generate variation in more distal limb structures, as well as functional specialization of the distal elements. (elifesciences.org)
  • This work demonstrates that mammalian metabolism is amenable to restoration of ancient core pathways, paving a path for genome-scale efforts to synthetically restore metabolic functions to the metazoan lineage. (elifesciences.org)
  • The fossil is preserved in stunning detail due to the nearby eruption of an ancient volcano, which caused ash and sudden mud flows to preserve everything in the area. (wlrh.org)
  • Here, we report progress on a large-scale synthetic genomics effort to reestablish EAA biosynthetic functionality in mammalian cells. (elifesciences.org)
  • In this report, the authors devised synthetic genomic strategies to introduce essential amino-acid biosynthetic pathways into mammalian cells. (elifesciences.org)
  • While the functionalization of methionine, threonine, and isoleucine synthesis was unsuccessful, restoration of valine synthesis rendered mammalian cells partially independent of exogenous valine. (elifesciences.org)
  • Tides of the Fundy Bay have revealed well-preserved fossils dating back to the Coal Age. (marineinsight.com)