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Sanxiasaurus
''Sanxiasaurus'' (meaning "Sanxia lizard", after the Three Gorges, Chinese ''Sanxia'', of the Yangtze River) is a genus of neornithischian dinosaur from the Middle Jurassic Xintiangou Formation in the Chongqing Municipality of China. The type and only species is ''S. modaoxiensis''. The holotype is a partial postcranial skeleton consisting of "55 bones including two cervical vertebrae, 11 dorsal vertebrae, 4 sacral vertebrae, 18 caudal vertebrae, both humeri, radii and ulnas, partial right ilium, partial right ischium, both femora and tibiae, left fibula, 3 metatarsi and 4 phalanges." In a phylogenetic analysis, it was found to be a basal neornithischian, more derived than ''Lesothosaurus'' and less derived than ''Hexinlusaurus ''Hexinlusaurus'' is a genus of basal ornithischian dinosaur from the Middle Jurassic of China. The holotype (ZDM T6001, Zigong Dinosaur Museum, Dashanpu, People's Republic of China), consists of an almost complete, articulated skull and some .... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xintiangou Formation
The Xintiangou Formation is a geological formation in China. Part of the stratigraphy of the Sichuan Basin, it is of an uncertain Middle Jurassic age, with preliminary U-Pb estimates giving an age range of 170 ma. It predominantly consists of interbedded mudstone and sandstone, with subordinate shelly limestone. At the Laojun site remains of lungfish, bony fish, freshwater sharks, temnospondyls, sauropterygians, crocodyliformes, the Xinjiangchelyid turtle '' Protoxinjiangchelys'' and tritylodontids are known. The dinosaurs ''Sanxiasaurus,'' ''Yunyangosaurus ''Yunyangosaurus'' (meaning "Yunyang County lizard") is a genus of possible megalosauroid dinosaur from the Xintiangou Formation in Chongqing, China China, officially the People's Republic of China (PRC), is a country in East Asia. It i ...'', and indeterminate sauropods are also known from the formation. Theropod and ornithopod tracks have also been reported from the formation. References {{reflist Jurassic Syst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neornithischian
Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. It is the sister group of the Thyreophora within the clade Genasauria. Neornithischians are united by having a thicker layer of asymmetrical enamel on the inside of their lower teeth. The teeth wore unevenly with chewing and developed sharp ridges that allowed neornithischians to break down tougher plant food than other dinosaurs. Neornithischians include a variety of basal forms historically known as "hypsilophodonts", including the Parksosauridae; in addition, there are derived forms classified in the groups Marginocephalia and Ornithopoda. The former includes clades Pachycephalosauria and Ceratopsia, while the latter typically includes ''Hypsilophodon'' and the more derived Iguanodontia. Classification Neornithischia was first named by Cooper in 1985 and defined as "all genasaurians more closely related to '' Parasaurolophus walkeri'' than to ''Ankylosaurus magniventris'' or ''Stegosaurus st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Jurassic
The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174.1 to 163.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relatively rare, but geological formations containing land animal fossils include the Forest Marble Formation in England, the Kilmaluag Formation in Scotland,British Geological Survey. 2011Stratigraphic framework for the Middle Jurassic strata of Great Britain and the adjoining continental shelf: research report RR/11/06 British Geological Survey, Keyworth, Nottingham. the Daohugou Beds in China, the Itat Formation in Russia, and the Isalo III Formation of western Madagascar. Paleogeography During the Middle Jurassic Epoch, Pangaea began to separate into Laurasia and Gondwana, and the Atlantic Ocean formed. Eastern Laurasia was tectonically active as the Cimmerian plate continued to collide with Laurasia's southern coast, completely closing the Paleo-Tethys Ocean. A subduction zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2019 In Paleontology
Flora Plants Fungi Paleomycological research * Fossil sporocarps indistinguishable from sporocarps of members of the extant genus ''Stemonitis'' are described from the Cretaceous amber from Myanmar by Rikkinen, Grimaldi & Schmidt (2019). * A study on the impact of major historical events such as the Cretaceous–Paleogene extinction event on the evolution of two major subclasses of lichen-forming fungi ( Lecanoromycetidae and Ostropomycetidae) is published by Huang ''et al.'' (2019). * Description of crustose lichens from European Paleogene amber is published by Kaasalainen ''et al.'' (2019). * Fungi belonging to the genera '' Periconia'', ''Penicillium'' and ''Scopulariopsis'', representing the first and the oldest known fossil record of these taxa, are described from the Eocene Baltic amber by Tischer ''et al.'' (2019). Sponges Research * Sponge spicules and spicule-like structures that probably represent sponge fossils are described from four sections of the Ediacaran-Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three Gorges
The Three Gorges () are three adjacent gorges along the middle reaches of the Yangtze River, in the hinterland of the People's Republic of China. With a subtropical monsoon climate, they are known for their scenery. The "Three Gorges Scenic Area" is classified as a AAAAA scenic area (the highest level) by the China National Tourism Administration. The Three Gorges—comprising the Qutang, Wu, and Xiling gorges—span , beginning at Baidi City of Chongqing, in the west and ending at Nanjing Pass, at Yichang City, Hubei Province, in the east, between which are the Fengjie and Wu Mountains of Chongqing, as well as Badong, Zigui, and Yichang of Hubei Province. Course of the Yangtze River After arriving at Yibin (), in Sichuan Province (), the Yangtze River () flows from Jiangjin (), of Chongqing Municipality (), to Yichang (), of Hubei Province (); and this section of the river is called '' Chuanjiang'' (), or "the river of Sichuan". In the past, it was the only waterwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangtze River
The Yangtze or Yangzi ( or ; ) is the longest list of rivers of Asia, river in Asia, the list of rivers by length, third-longest in the world, and the longest in the world to flow entirely within one country. It rises at Jari Hill in the Tanggula Mountains (Tibetan Plateau) and flows in a generally easterly direction to the East China Sea. It is the List of rivers by discharge, seventh-largest river by discharge volume in the world. Its drainage basin comprises one-fifth of the land area of China, and is home to nearly one-third of the demographics of China, country's population. The Yangtze has played a major role in the history of China, history, culture of China, culture, and economy of China. For thousands of years, the river has been used for water, irrigation, sanitation, transportation, industry, boundary-marking, and war. The prosperous Yangtze Delta generates as much as 20% of historical GDP of China, China's GDP. The Three Gorges Dam on the Yangtze is the list ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya; their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous–Paleogene extinction event approximately 66 mya. Dinosaurs can therefore be divided into avian dinosaurs—birds—and the extinct non-avian dinosaurs, which are all dinosaurs other than birds. Dinosaurs are varied from taxonomic, morphological and ecological standpoints. Birds, at over 10,700 living species, are among ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chongqing Municipality
Chongqing ( or ; ; Sichuanese pronunciation: , Standard Mandarin pronunciation: ), alternately romanized as Chungking (), is a municipality in Southwest China. The official abbreviation of the city, "" (), was approved by the State Council on 18 April 1997. This abbreviation is derived from the old name of a part of the Jialing River that runs through Chongqing and feeds into the Yangtze River. Administratively, it is one of the four municipalities under the direct administration of the central government of the People's Republic of China (the other three are Beijing, Shanghai, and Tianjin), and the only such municipality located deep inland. The municipality of Chongqing, roughly the size of Austria, includes the city of Chongqing as well as various discontiguous cities. Due to a classification technicality, Chongqing municipality can claim to be the largest city proper in the worldthough it does not have the world's largest urban area. Chongqing is the only city in Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lesothosaurus
''Lesothosaurus'' is a monospecific genus of ornithischian dinosaur that lived during the Early Jurassic in what is now South Africa and Lesotho. It was named by paleontologist Peter Galton in 1978, the name meaning " lizard from Lesotho". The genus has only one valid species, ''Lesothosaurus diagnosticus''. ''Lesothosaurus'' is one of the most completely-known early ornithischians, based on numerous skull and postcranial fossils from the Upper Elliot Formation. It had a simpler tooth and jaw anatomy than later ornithischians, and may have been omnivorous in some parts of the year. Discovery and naming Fossils referrable to ''Lesothosaurus'' may have been known from as early as 1959, when a right dentary (lower jawbone) fragment bearing three teeth was collected by French geologist Jean Fabre from the Red Beds of the Upper Elliot Formation near Mapheteng in Lesotho, Southern Africa, dating to the Early Jurassic (199(?)-190 million years ago).Ginsburg, L., (1964), "Decouvert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexinlusaurus
''Hexinlusaurus'' is a genus of basal ornithischian dinosaur from the Middle Jurassic of China. The holotype (ZDM T6001, Zigong Dinosaur Museum, Dashanpu, People's Republic of China), consists of an almost complete, articulated skull and some postcranial material, collected from a terrestrial sandstone within the Lower Shaximiao Formation (?Bajocian) at the famous dinosaur-bearing quarries at Dashanpu. A paratype (ZDM T6002) consists of a partial skull and postcranial remains. Previously, it had been described as a species of ''Yandusaurus'', ''Y. multidens'' (He and Cai, 1983), but was reclassified as a new taxon by Paul M. Barrett, Richard J. Butler and Fabien Knoll in 2005, who diagnosed this anatomically conservative species as follows: "A small ornithischian dinosaur distinguished from all other basal ornithischians by a single autapomorphy, the presence of a marked concavity that extends over the lateral surface of the postorbital." The etymology of the genus name honors Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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