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Cyclanorbinae
Cyclanorbinae, also known commonly as the flapshell turtles, is a subfamily of softshell turtles in the family Trionychidae. The subfamily is native to Africa and Asia. Taxonomy Morphological evidence supports Cyclanorbinae being the sister group to the Plastomeninae, an extinct subfamily of softshell turtles that inhabited North America from the Cretaceous to the Eocene. Genera The subfamily Cyclanorbinae contains the following three extant genera.Turtle Taxonomy Working Group (Rhodin, Anders G.J.; Parham, James F.; van Dijk, Peter Paul; Iverson, John B.) (2009"Turtles of the World: Annotated Checklist of Taxonomy and Synonymy, 2009 Update". ''Chelonian Research Monographs'' (5): 000.39-000.84. (Cyclanorbinae, pp. 000.55-000.56). *'' Cyclanorbis'' *'' Cycloderma'' *''Lissemys'' One extinct prehistoric genus is also known from fossil remains: '' Nemegtemys'' , from the Cretaceous of Mongolia. Geographic range Species A species () is often defined as the largest gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionychidae
Trionychidae is a family of turtles, commonly known as softshell turtles or simply softshells. The family was described by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish waters. Members of this family occur in Africa, Asia, and North America, with extinct species known from Australia. Most species have traditionally been included in the genus '' Trionyx'', but the vast majority have since been moved to other genera. Among these are the North American '' Apalone'' softshells that were placed in ''Trionyx'' until 1987. Characteristics Turtles of the family Trionychidae are called "softshell" because their carapaces lack horny scutes (scales), though the spiny softshell, '' Apalone spinifera'', does have some scale-like projections, to which its common name refers. The carapace is leathery and pliable, particularly at the sides. The central part of the carapace has a layer of solid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastomeninae
Plastomeninae is an Extinction, extinct subfamily of Trionychidae, softshell turtles that inhabited most of North America from the Cretaceous to the Eocene. Members of this subfamily are also known as plastomenines. Taxonomy and evolution They are thought to have originated in North America during or shortly before the Campanian from basal Trionychidae, trionychids that dispersed from Asia. They reached their peak diversity from the Maastrichtian through the Paleocene, having survived the Cretaceous–Paleogene extinction event. However, they went entirely extinct by the Lutetian. The last surviving member of this subfamily is thought to have been ''Plastomenus thomasii'', which is the only known member of the subfamily to have survived past the Paleocene into the Eocene. Morphological analysis supports them being the Sister group, sister taxon to the Cyclanorbinae, flapshell turtles (subfamily Cyclanorbinae), which still survive to the present day in parts of tropical Asia an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nemegtemys
''Nemegtemys'' is an extinct genus of cyclanorbine trionychid that lived during the Late Cretaceous epoch. Distribution Fossils of ''N. conflata'' are known from the Nemegt Formation, a geologic formation in Mongolia dating to the Maastrichtian stage Stage, stages, or staging may refer to: Arts and media Acting * Stage (theatre), a space for the performance of theatrical productions * Theatre, a branch of the performing arts, often referred to as "the stage" * ''The Stage'', a weekly Brit .... References {{Taxonbar, from=Q21371293 Cretaceous reptiles of Asia Monotypic prehistoric reptile genera Fossil taxa described in 2014 Trionychidae Prehistoric turtle genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissemys
''Lissemys'' is a genus of softshell turtles in the subfamily Cyclanorbinae of the Family (biology), family Trionychidae. The genus is indigenous to southern Asia. Species The genus ''Lissemys'' contains three extant species which are recognized as being valid. *''Lissemys ceylonensis'' – Sri Lankan flapshell turtle *''Lissemys punctata'' – Indian flapshell turtle *''Lissemys scutata'' – Burmese flapshell turtle Several Extinction, extinct fossil species have been described for this genus, such as ''Lissemys piramensis'' , from Piram Island, India, but these are largely considered Nomen dubium, ''nomen dubia''. However, the extant Indian flapshell turtle (''L. punctata'') is known from fossils from as early as the Miocene. ''Nota bene'': A Binomial nomenclature, binomial authority in parentheses indicates that the species was originally described in a genus other than ''Lissemys''. References Bibliography * * Further reading *Malcolm Arthur Smith, Smith, M. A. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycloderma
''Cycloderma'' is a genus of softshell turtles in the subfamily Cyclanorbinae of the family Trionychidae. The genus is endemic to Africa. Species The genus ''Cycloderma'' contains the following extant species: * Aubry's flapshell turtle – ''Cycloderma aubryi'' * Zambezi flapshell turtle – ''Cycloderma frenatum'' Two extinct fossil species are also known: '' Cycloderma victoriae'' , from the early Miocene of Kenya; and '' Cycloderma debroinae'' , from the late Miocene to the Pliocene of Kenya. ''Nota bene ( ; plural: ) is the Latin language, Latin phrase meaning ''note well''. In manuscripts, ''nota bene'' is abbreviated in upper-case as NB and N.B., and in lower-case as n.b. and nb; the editorial usages of ''nota bene'' and ''notate bene'' fi ...'': A binomial authority in parentheses indicates that the species was originally described in a genus other than ''Cycloderma''. References Bibliography * * Further reading * Peters W (1854). "''Übersicht der auf sein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclanorbis
''Cyclanorbis'' is a genus of softshell turtles in the family Trionychidae. The genus is endemic to Africa. Description In the genus ''Cyclanorbis'' the plastron has cutaneous flaps, under which the hind legs can be concealed. Species The genus ''Cyclanorbis'' contains the following extant species: * Nubian flapshell turtle – ''Cyclanorbis elegans'' * Senegal flapshell turtle – ''Cyclanorbis senegalensis'' One extinct species is also known from fossil remains: '' Cyclanorbis turkanensis'' , from the Pliocene of Kenya. ''Nota bene ( ; plural: ) is the Latin language, Latin phrase meaning ''note well''. In manuscripts, ''nota bene'' is abbreviated in upper-case as NB and N.B., and in lower-case as n.b. and nb; the editorial usages of ''nota bene'' and ''notate bene'' fi ...'': A binomial authority in parentheses indicates that the species was originally described in a genus other than ''Cyclanorbis''. References Bibliography * * Further reading * Gray JE (1854) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongolia
Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south and southeast. It covers an area of , with a population of 3.5 million, making it the world's List of countries and dependencies by population density, most sparsely populated sovereign state. Mongolia is the world's largest landlocked country that does not border an Endorheic basin, inland sea, and much of its area is covered by grassy steppe, with mountains to the north and west and the Gobi Desert to the south. Ulaanbaatar, the capital and List of cities in Mongolia, largest city, is home to roughly half of the country's population. The territory of modern-day Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Xianbei, the Rouran, the First Turkic Khaganate, the Second Turkic Khaganate, the Uyghur Khaganate and others. In 1206, Genghis Khan founded the Mongol Empire, which became the largest List of largest empires, contiguous land empire i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igor G
Igor may refer to: * Igor (given name), an East Slavic given name and a list of people with the name Arts, entertainment, and media *Igor (character), a stock character * Igors (''Discworld''), a fictional humanoid family in the ''Discworld'' book series by Terry Pratchett * ''Igor'' (album), a 2019 album by Tyler, the Creator * ''Igor'' (film), a 2008 American animated film * '' Igor: Objective Uikokahonia'', a 1994 Spanish MS-DOS PC video game Computing * Igor Engraver, a music notation computer program * IGOR Pro, a computer program for scientific data analysis Other uses * Igor (crater), a tiny crater in the Mare Imbrium region of the Moon * Igor (walrus), a walrus that lived in the Dolfinarium Harderwijk * Igor Naming Agency, an American naming agency * Hurricane Igor Hurricane Igor was a very large tropical cyclone which became the most destructive on record to strike the Canadian island of Newfoundland. It originated from a broad area of low pressure that moved o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. In addition, the record can predict and fill gaps such as the discovery of '' Tiktaalik'' in the arctic of Canada. Paleontology includes the study of fossils: their age, method of formation, and evolutionary significance. Specimens are sometimes considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years to 4.1 billion years old. Early edition, published online before prin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
