A5088035125- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Bat Biology and Ecology Studies
- Animal Ecology and Behavior Studies
- Morphological variations and asymmetry
- Species Distribution and Climate Change
- Primate Behavior and Ecology
- Ichthyology and Marine Biology
- Marine animal studies overview
- Pleistocene-Era Hominins and Archaeology
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Amphibian and Reptile Biology
- Museums and Cultural Heritage
- Genetic diversity and population structure
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Geological formations and processes
- Animal and Plant Science Education
- Evolution and Science Education
- History of Science and Natural History
- Geological Studies and Exploration
- Botany, Ecology, and Taxonomy Studies
- Ecology and biodiversity studies
- Genomics and Phylogenetic Studies
American Museum of Natural History
2007-2023
New York Times
2020
Rutgers, The State University of New Jersey
2005
Yale University
2005
Massachusetts General Hospital
2005
Harvard University
2005
University of Louisville
2003-2005
Carnegie Museum of Natural History
2001-2005
University of Wyoming
2005
Museum für Naturkunde
2005
To discover interordinal relationships of living and fossil placental mammals the time origin placentals relative to Cretaceous-Paleogene (K-Pg) boundary, we scored 4541 phenomic characters de novo for 86 species. Combining these data with molecular sequences, obtained a phylogenetic tree that, when calibrated fossils, shows that crown clade Placentalia orders originated after K-Pg boundary. Many nodes discovered using are upheld, but signals overturn show Sundatheria (Dermoptera +...
On the basis of a carbon isotopic record both marine carbonates and organic matter from Triassic-Jurassic boundary to present, we modeled oxygen concentrations over past 205 million years. Our analysis indicates that atmospheric approximately doubled this period, with relatively rapid increases in early Jurassic Eocene. We suggest overall increase oxygen, mediated by formation passive continental margins along Atlantic Ocean during opening phase current Wilson cycle, was critical factor...
An embryonic skeleton of a nonavian theropod dinosaur was found preserved in an egg from Upper Cretaceous rocks the Gobi Desert Mongolia. Cranial features identify embryo as member Oviraptoridae. Two embryo-sized skulls dromaeosaurids, similar to that Velociraptor , were also recovered nest. The eggshell microstructure is ratite birds and type common Djadokhta Formation at Flaming Cliffs (Bayn Dzak). Discovery nest such eggs 1923, beneath Oviraptor philoceratops holotype, suggests this may...
The current massive degradation of habitat and extinction species is taking place on a catastrophically short timescale, their effects will fundamentally reset the future evolution planet's biota. fossil record suggests that recovery global ecosystems has required millions or even tens years. Thus, intervention by humans, very agents environmental crisis, for any possibility short-term maintenance Many efforts have deficiencies, including insufficient information diversity distribution...
To engage people in biodiversity and other environmental issues, one must provide the opportunity for enhanced understanding that empowers individuals to make choices take action based on sound science reliable recommendations. this end, we acknowledge some real challenges. Recent surveys show that, despite growing public concern, issues still rank below many problems, such as terrorism, health care, economy, (in U.S.) family values. Moreover, much of recent upswing interest environment is...
Abstract- Diverse morphological evidence from both living and fossil taxa suggests several higher-level groupings of the Recent orders eutherian mammals. The strongest hypotheses closely relate rodents lagomorphs within Glires, proboscideans sirenians Tethytheria, hyracoids tethytheres Paenungulata, chiropterans dermopterans, pholidotans edentates. Somewhat weaker supports Glires with macroscelideans, primates tree-shrews bats flying lemurs (Archonta), all Eutheria excluding pangolins...
The time is ripe for a comprehensive mission to explore and document Earth's species. This calls campaign educate inspire the next generation of professional citizen species explorers, investments in cyber-infrastructure collections meet unique needs producers consumers taxonomic information, formation coordination multi-institutional, international, transdisciplinary community researchers, scholars engineers with shared objective creating inventory detailed map biosphere. We conclude that...
The fossil record offers the only direct evidence of extinct life and thus has figured prominently in considerations evolutionary patterns. But incomplete nature also been emphasized arguments that fossils play a secondary role recovery phylogenetic histories based on extant taxa. Although these criticisms recently have countered, there is no general understanding correspondence between phylogeny. An empirical survey published studies suggests basis for assuming stratigraphic occurrence...
Maelestes gobiensis Wible et al., 2007, is the second new eutherian mammal to be named from rich Mongolian Late Cretaceous locality of Ukhaa Tolgod, Ukhaatherium nessovi Novacek 1997, being first. only seventh known skull and upper lower dentitions, fifth some postcranial elements. The type specimen, PSS-MAE 607, described illustrated in detail. amended include: an incomplete skull, left dentary, atlas, axis, last cervical first 11 thoracic vertebrae, partial ribs, scapula, clavicle,...
We describe several fossils referable to Gomphos elkema from deposits close the Paleocene-Eocene boundary at Tsagan Khushu, Mongolia. shares a suite of cranioskeletal characters with extant rabbits, hares, and pikas but retains primitive dentition jaw compared its modern relatives. Phylogenetic analysis supports position as stem lagomorph excludes Cretaceous taxa crown radiation placental mammals. Our results support hypothesis that rodents lagomorphs radiated during Cenozoic diverged other...
Exquisitely preserved specimens of the Late Cretaceous eutherian Zalambdalestes recently collected from Djadokhta Formation (Early Campanian) Gobi Desert by Mongolian Academy Sciences–American Museum Natural History Expeditions are centerpiece a thorough redescription this taxon's craniodental morphology. Resolved and amended uncertainties errors in prior descriptions based on poorer earlier expeditions to Gobi. Preserved described for first time is basicranium, including an ectotympanic...
Abstract- As the only direct evidence of past organismic history, fossil record has always figured importantly in reconstruction phylogeny. But incomplete nature also been cited as a basis for claiming that fossils play secondary role developing phylogenetic hypotheses encompass extant taxa. The reliability data such applications is function degree fit between superpositional relationships and sequence events. Thirty-eight vertebrate cases are examined age based on first occurrences results...
A new mammal, Henosferus molus, n.gen. and n.sp., from the Callovian–Oxfordian (latest Middle to earliest Late Jurassic) Cañadón Asfalto Formation Chubut Province (Argentina) is described. This taxon corresponds a species clearly different Asfaltomylos patagonicus same locality stratigraphic level. based on three lower jaws with relatively well-preserved dentition. The jaw shows primitive morphology having Meckelian groove, prominent medial flange associated lateral ridge of dentary, deep...
ABSTRACT A survey of the variation in eutherian auditory bulla and a consideration its ontogeny possible mode origin suggests that basisphenoid insectivores, petrosal primates, widely distributed ectotympanic did not represent condition most primitive eutherians. There is also evidence to refute accepted premise eutherians primitively had cartilaginous as adults. Instead, this regarded secondary specialization derived from bony entotympanic bulla. The was undoubtedly an early, but probably...