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Manchurochelys
''Manchurochelys'' is an extinct genus of turtle in the order Paracryptodira. It existed during the early Cretaceous of what is now northeast China. It has been found in the Jianshangou Bed of West Liaoning's Yixian Formation. However, it is a rarely found fossil. ''Manchurochelys'' was first named by Endo and Shikama in 1942, and contains the single species, ''M. manchoukuoensis'' (sometimes misspelled ''M. manchouensis''). A second species, ''M. liaoxensis'', was named in 1995 but was later shown to be a species of '' Ordosemys''.Tong, H., Ji, S. and Ji, Q. (2004).''Ordosemys'' (Testudines, Cryptodira) from the Yixian Formation of Liaoning Province, northeastern China: new specimens and systematic revision. American Museum Novitates, 3438: 1-20. ''Manchurochelys'' was a relative of the modern-day snapping turtle. It has been occasionally placed in the family Sinemydidae, although it is said to more likely belong in the family Macrobaenidae. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manchurochelys Manchoukuoensis
''Manchurochelys'' is an extinct genus of turtle in the order Paracryptodira. It existed during the early Cretaceous of what is now northeast China. It has been found in the Jianshangou Bed of West Liaoning's Yixian Formation. However, it is a rarely found fossil. ''Manchurochelys'' was first named by Endo and Shikama in 1942, and contains the single species, ''M. manchoukuoensis'' (sometimes misspelled ''M. manchouensis''). A second species, ''M. liaoxensis'', was named in 1995 but was later shown to be a species of '' Ordosemys''.Tong, H., Ji, S. and Ji, Q. (2004).''Ordosemys'' (Testudines, Cryptodira) from the Yixian Formation of Liaoning Province, northeastern China: new specimens and systematic revision. American Museum Novitates, 3438: 1-20. ''Manchurochelys'' was a relative of the modern-day snapping turtle. It has been occasionally placed in the family Sinemydidae, although it is said to more likely belong in the family Macrobaenidae. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinemydidae
Sinemydidae is an extinct family of turtles from Cretaceous to Paleocene deposits in Asia and North America. Their exact position is engimatic, they have alternatively been considered stem-group cryptodires, but also "crownward stem-turtles" alongside Macrobaenidae, Paracryptodira, Xinjiangchelyidae, Thalassochelydia and Sandownidae outside of crown Testudines. Genera *'' Dracochelys'' Lianmugin Formation, China, Early Cretaceous (Aptian-Albian) *'' Hongkongochelys'' Upper Shaximiao Formation, China, Middle-Late Jurassic *'' Jeholochelys'' Jiufotang Formation, China, Early Cretaceous (Aptian) *'' Liaochelys'' Jiufotang Formation, China, Early Cretaceous (Aptian) *'' Manchurochelys'' Yixian Formation, China, Early Cretaceous (Aptian) *'' Ordosemys'' **''O''. ''leios'' Luohandong Formation, China, Early Cretaceous **''O''. ''liaoxiensis'' Chengzihe Formation, China, Early Cretaceous (Aptian) **''O''. ''brinkmania'' Lianmugin Formation, China, Early Cretaceous (Aptian-Albian) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptodira
The Cryptodira ('' el, hidden neck'') are a suborder of Testudines that includes most living tortoises and turtles. Cryptodira differ from Pleurodira (side-necked turtles) in that they lower their necks and pull the heads straight back into the shells, instead of folding their necks sideways along the body under the shells' marginals. They include among their species freshwater turtles, snapping turtles, tortoises, softshell turtles, and sea turtles. Neck retraction The Cryptodira are characterized by retraction of the head in the vertical plane, which permits for primarily vertical movements and restricted lateral movements outside of the shell. These motions are largely due to the morphology and arrangement of cervical vertebrae. In all recent turtles, the cervical column consists of nine joints and eight vertebrae. Compared to the narrow vertebrae and the closely positioned zygapophyses of the pleurodires, the cryptodires’ vertebrae take on the opposite shape. Their ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordosemys
''Ordosemys'' is an extinct genus of sea turtle from the Cretaceous period The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of t .... References Extinct turtles Early Cretaceous turtles Early Cretaceous reptiles of Asia Yixian fauna Paleontology in Shandong Fossil taxa described in 1994 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yixian Fauna
Yixian may refer to : ; Places and jurisdictions * Yi County, Anhui, in China * Yi County, Hebei, in China * Yi County, Liaoning, in China * the Latin Catholic Apostolic Prefecture of Yixian, near Beijing and Baoding * Yi County, Shandong, now Yicheng District, Zaozhuang * Yixian Formation The Yixian Formation (; formerly transcribed as Yihsien Formation) is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans the late Barremian and early Aptian stages of the Early Cretaceous. It is known for its exq ..., a geological formation in Liaoning Province ;Persons * Empress Yixian, Liang Nüying (died 159), Chinese empress during the Han Dynasty {{disambig, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous Reptiles Of Asia
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Paleofaunal Database initiative, which operated from August 1998 through August 2000. From 2000 to 2015, PBDB received funding from the National Science Foundation. PBDB also received support form the Australian Research Council. From 2000 to 2010 it was housed at the National Center for Ecological Analysis and Synthesis, a cross-disciplinary research center within the University of California, Santa Barbara. It is currently housed at University of Wisconsin-Madison and overseen by an international committee of major data contributors. The Paleobiology Database works closely with the Neotoma Paleoecology Database, which has a similar intellectual history, but has focused on the Quaternary (with an emphasis on the late Pleistocene and Holocen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snapping Turtle
The Chelydridae is a family of turtles that has seven extinct and two extant genera. The extant genera are the snapping turtles, ''Chelydra'' and '' Macrochelys''. Both are endemic to the Western Hemisphere. The extinct genera are '' Acherontemys'', '' Chelydrops'', '' Chelydropsis'', ''Emarginachelys'', '' Macrocephalochelys'', '' Planiplastron'', and '' Protochelydra''. Fossil history The Chelydridae have a long fossil history, with extinct species reported from North America as well as all over Asia and Europe, far outside their present range. The earliest described chelydrid is '' Emarginachelys cretacea'', known from well-preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana. Another well-preserved fossil chelydrid is the Late Paleocene ''Protochelydra zangerli'' from North Dakota. The carapace of ''P. zangerli'' is higher-domed than that of the recent ''Chelydra'', a trait conjectured to be associated with the coexistence of large, turtle-eatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beijing Museum Of Natural History
The Beijing Museum of Natural History (BMNH; ) is located at 126 Tian Qiao Nan Street, Dongcheng District, Beijing, 100050, and is the most popular natural history museum in China. It was founded in 1951 as the National Central Museum of Natural History, and its name was changed to the ''Beijing Museum of Natural History'' in 1962. The BMNH is the first large scale natural history museum created in China.BMNH website The BMNH has total floor space of 24,000 square meters, of which 8,000 square meters are available for display and owns more than 200,000 specimens. The major display area is the Tian Jiabing Building. The collections include |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yixian Formation
The Yixian Formation (; formerly transcribed as Yihsien Formation) is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans the late Barremian and early Aptian stages of the Early Cretaceous. It is known for its exquisitely preserved fossils, and is mainly composed of basalts interspersed with siliciclastic sediments. History Japanese occupation The potential importance of the Yixian Formation was initially recognized during the time the Empire of Japan occupied China's Rehe ("Jehol") Province after the First battle of Hopei in 1933. Many Japanese scientists had noticed fossil remains of extinct fish and reptiles, possibly the champsosaurs. These initial fossil discoveries made by Japanese scientists vanished once World War II ended in 1945. Chinese rediscovery By 1949, when administration of the area passed to the Chinese Communist Party and its leader Mao Zedong, the fossils of Yixian were studied only by Chinese scientists. It was not unt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liaoning
Liaoning () is a coastal province in Northeast China that is the smallest, southernmost, and most populous province in the region. With its capital at Shenyang, it is located on the northern shore of the Yellow Sea, and is the northernmost coastal province of the People's Republic of China. Historically a gateway between China proper and Manchuria, the modern Liaoning province was established in 1907 as Fengtian or Fengtien province and was renamed Liaoning in 1929. It was also known at that time as Mukden Province for the Manchu name of ''Shengjing'', the former name of Shenyang. Under the Japanese-puppet Manchukuo regime, the province reverted to its 1907 name, but the name Liaoning was restored for a brief time in 1945 and then again in 1954. Liaoning borders the Yellow Sea ( Korea Bay) and Bohai Sea in the south, North Korea's North Pyongan and Chagang provinces in the southeast, Jilin to the northeast, Hebei to the southwest, and Inner Mongolia to the northwest. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
