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Hillary Maddin
Hillary Catherine Maddin is a Canadians, Canadian Paleontology, paleontologist and Developmental biology, developmental biologist known for her work on development in extinct and extant amphibians. She is currently an associate professor in the Department of Earth Sciences at Carleton University. Academic and professional background Maddin obtained her B.Sc. in biology from the University of Toronto (1999-2004). She went on to also complete her M.Sc. degree at the University of Toronto (2004-2006) researching Caseidae, caseid synapsids under the supervision of Robert R. Reisz, Robert Reisz, followed by a Ph.D. degree (2006-2011) exploring the morphology and evolution of caecilians at the University of Calgary under the supervision of Anthony Russell and Jason Anderson. Maddin was awarded the highly competitive NSERC postdoctoral fellowship, which she used to fund a position at the Museum of Comparative Zoology and Harvard University in Cambridge, Massachusetts, Cambridge, MA (2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadians
Canadians (french: Canadiens) are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''Canadian''. Canada is a multilingual and Multiculturalism, multicultural society home to people of groups of many different ethnic, religious, and national origins, with the majority of the population made up of Old World Immigration to Canada, immigrants and their descendants. Following the initial period of New France, French and then the much larger British colonization of the Americas, British colonization, different waves (or peaks) of immigration and settlement of non-indigenous peoples took place over the course of nearly two centuries and continue today. Elements of Indigenous, French, British, and more recent immigrant customs, languages, and religions have combined to form the culture of Canada, and thus a Canadian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ottawa
Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core of the Ottawa–Gatineau census metropolitan area (CMA) and the National Capital Region (NCR). Ottawa had a city population of 1,017,449 and a metropolitan population of 1,488,307, making it the fourth-largest city and fourth-largest metropolitan area in Canada. Ottawa is the political centre of Canada and headquarters to the federal government. The city houses numerous foreign embassies, key buildings, organizations, and institutions of Canada's government, including the Parliament of Canada, the Supreme Court, the residence of Canada's viceroy, and Office of the Prime Minister. Founded in 1826 as Bytown, and incorporated as Ottawa in 1855, its original boundaries were expanded through numerous annexations and were ultimately ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reiszerpeton Renascentis
''Reiszerpeton'' is an extinct genus of dissorophid temnospondyl known from the Early Permian Archer City Formation of Texas. It is known solely from the holotype, MCZ 1911, a complete skull. This specimen was originally referred to the amphibamiform '' Tersomius texensis''. A reappraisal of the holotype of ''T. texensis'' and a number of other referred specimens by Maddin et al. (2013) noted a number of differences from both ''T. texensis'' and amphibamiforms more broadly that suggested affinities with the Dissorophidae. This was confirmed by a phylogenetic analysis, which placed it as the sister taxon to the Eucacopinae (''Cacops'' + ''Zygosaurus'' + ''Kamacops''). ''Reiszerpeton'' is known only from the type species, ''R. renascentis'', which was named for Canadian paleontologist Robert Reisz Robert Rafael Reisz is a Canadian paleontologist and specialist in the study of early amniote and tetrapod evolution. Research career Reisz received his B.Sc. (1969), M.Sc. (1971) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infernovenator
''Infernovenator'' is a genus of Carboniferous Lysorophia, lysorophian Recumbirostra, recumbirostran from the Mazon Creek fossil beds, Mazon Creek lagerstätte in Illinois, U.S. It was described in 2019. History of study The holotype, now reposited at the Field Museum of Natural History, Field Museum, was previously described by Godfrey (1997) as an aïstopod, ''Phlegethontia longissama''. Redescription of the specimen led to its identification as a new lysorophian taxon. ''Infernovenator'' is represented only by the holotype, a nearly complete skeleton. The genus name is given for the Latin ''infernum'' ("hell") to refer to the fossorial habitats of the taxon and ''venator'' ("hunter"). The species name honors paleontologist Margaret Clair Steen Brough. Anatomy ''Infernovenator'' is diagnosed by a unique combination of features: (1) 61 presacral vertebrae; (2) a triangular postfrontal that contacts the tabular; (3) a circumorbital series formed by the prefrontal, the postfro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diabloroter
''Diabloroter'' is a Carboniferous genus of brachystelechid ' microsaur' from the Mazon Creek The Mazon Creek fossil beds are a conservation ' found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions, formed approximately in the mid- Pennsylvanian epoch of the Carboniferous period. These concreti ... lagerstätte in Illinois. It was named in 2019 by Arjan Mann and Hillary C. Maddin. History of study The genus name is derived from the roots ''diabolus'' ("devil"), which refers to the stark red color of the latex peels used in the original study, and ''rota'' ("wheel") to refer to the English rotavator (a digger), which in turn refers to the fossorial ecology of recumbirostrans. The specific name honors American paleontologist John Bolt. The taxon is represented by a single, nearly complete skeleton that was collected from the Sunspot Mine at Mazon Creek, Illinois. Anatomy Mann and Maddin (2019) diagnose ''Diabloroter'' by the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbonodraco
''Carbonodraco'' is an extinct genus of acleistorhinid parareptile known from the Late Carboniferous of Ohio. It contains a single species, ''Carbonodraco lundi''. It was closely related to ''Colobomycter'', a parareptile from the early Permian of Oklahoma. ''Carbonodraco'' is the oldest known parareptile, and is slightly older than ''Erpetonyx'', the previously oldest known parareptile. Specimens of ''Carbonodraco'' are limited to skull and jaw fragments found at the Ohio Diamond Coal mine in Linton, Ohio. These include the holotype specimen (CM 23055, a crushed skull) and two referred specimens (NHMUK R. 2667, a right jaw; CM 81536, a pair of dentaries). Several of the ''Carbonodraco'' specimens were previously referred to the Carboniferous eureptile ''Cephalerpeton ''Cephalerpeton'' is an extinct genus of " protorothyridid" eureptile known from the Late Carboniferous (late Westphalian stage) of Illinois. It is known from the holotype YPM 796, a partial skeleton. It w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendromaia
''Dendromaia'' is an extinct genus of Varanopidae, varanopid from the Carboniferous of Nova Scotia. It contains a single species, ''Dendromaia unamakiensis''. ''Dendromaia'' is the oldest known varanopid, likely the oldest known synapsid, and the only member of the family Varanopidae to be discovered in Nova Scotia. Known from a large partial skeleton preserved with its tail wrapped around a much smaller partial skeleton, ''Dendromaia'' may also represent the oldest known occurrence of parental care in the fossil record. While the larger skeleton possessed certain mycterosaurine-like features, the smaller skeleton resembled basal varanopids such as ''Archaeovenator'' and ''Pyozia'', creating uncertainty over whether characteristics at the base of Varanopidae have legitimate Phylogenetics, phylogenetic significance or instead reflect the immaturity of basal varanopid specimens. Discovery ''Dendromaia unamakiensis'' is known from a slab and counterslab containing two skeletons. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature Ecology & Evolution
''Nature Ecology and Evolution'' is an online-only monthly peer-reviewed scientific journal published by Nature Publishing Group covering all aspects of research on ecology and evolutionary biology. It was established in 2017. Its first and current editor-in-chief is Patrick Goymer. According to the ''Journal Citation Reports'', ''Nature Ecology and Evolution'' has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 15.46. References External links * Nature Research academic journals Publications established in 2017 Ecology journals Monthly journals English-language journals {{ecology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature Communications
''Nature Communications'' is a peer-reviewed, open access, scientific journal published by Nature Portfolio since 2010. It is a multidisciplinary journal and it covers the natural sciences, including physics, chemistry, earth sciences, medicine, and biology. The journal has editorial offices in London, Berlin, New York City, and Shanghai. The founding editor-in-chief was Lesley Anson, followed by Joerg Heber, Magdalena Skipper, and Elisa De Ranieri. As of 2022, the editors are Nathalie Le Bot for health and clinical sciences, Stephane Larochelle for biological sciences, Enda Bergin for chemistry and biotechnology, and Prabhjot Saini for physics and earth sciences. Starting October 2014, the journal only accepted submissions from authors willing to pay an article processing charge. Until the end of 2015, part of the published submissions were only available to subscribers. In January 2016, all content became freely accessible. Starting from 2017, the journal offers a deposition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Reviews
The Cambridge Philosophical Society (CPS) is a scientific society at the University of Cambridge. It was founded in 1819. The name derives from the medieval use of the word philosophy to denote any research undertaken outside the fields of law, theology and medicine. The society was granted a royal charter by King William IV in 1832. The society is governed by an elected council of senior academics, which is chaired by the Society's President, according to a set of statutes. The society has published several scientific journals, including ''Biological Reviews'' (established 1926) and ''Mathematical Proceedings of the Cambridge Philosophical Society'' (formerly entitled ''Proceedings of the Cambridge Philosophical Society'', published since 1843). ''Transactions of the Cambridge Philosophical Society'' was published between 1821–1928, but was then discontinued. History The society was founded in 1819 by Edward Clarke, Adam Sedgwick and John Stevens Henslow, and is Cambr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axolotl
The axolotl (; from nci, āxōlōtl ), ''Ambystoma mexicanum'', is a paedomorphic salamander closely related to the tiger salamander. Axolotls are unusual among amphibians in that they reach adulthood without undergoing metamorphosis. Instead of taking to the land, adults remain aquatic and gilled. The species was originally found in several lakes underlying what is now Mexico City, such as Lake Xochimilco and Lake Chalco. These lakes were drained by Spanish settlers after the conquest of the Aztec Empire, leading to the destruction of much of the axolotl’s natural habitat. Axolotls should not be confused with the larval stage of the closely related tiger salamander (''A. tigrinum''), which are widespread in much of North America and occasionally become paedomorphic. Neither should they be confused with mudpuppies (''Necturus'' spp.), fully aquatic salamanders from a different family that are not closely related to the axolotl but bear a superficial resemblance. , wild ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Clawed Frog
The African clawed frog (''Xenopus laevis'', also known as the xenopus, African clawed toad, African claw-toed frog or the ''platanna'') is a species of African aquatic frog of the family Pipidae. Its name is derived from the three short claws on each hind foot, which it uses to tear apart its food. The word ''Xenopus'' means 'strange foot' and ''laevis'' means 'smooth'. The species is found throughout much of Sub-Saharan Africa (Nigeria and Sudan to South Africa),Weldon; du Preez; Hyatt; Muller; and Speare (2004). Origin of the Amphibian Chytrid Fungus.' Emerging Infectious Diseases 10(12). and in isolated, introduced populations in North America, South America, Europe, and Asia. All species of the family Pipidae are tongueless, toothless and completely aquatic. They use their hands to shove food in their mouths and down their throats and a hyobranchial pump to draw or suck things in their mouth. Pipidae have powerful legs for swimming and lunging after food. They also use the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
