|
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 In biology, a species is the basic unit of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 In biology, a species is the basic unit of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trionychidae
The Trionychidae are a taxonomic family of a number of turtle genera, commonly known as softshell turtles. The family was erected by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish areas. 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 They are called "softshell" because their carapaces lack horny scutes (scales), though the spiny softshell, ''Apalone spinifera'', does have some scale-like projections, hence its name. The carapace is leathery and pliable, particularly at the sides. The central part of the carapace has a layer of solid bone beneath it, as in other turtles, but t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastomeninae
Plastomeninae is an extinct subfamily of 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 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 taxon to the flapshell turtles (subfamily Cyclanorbinae), which still survive to the present day in parts of tropical Asia and Africa, in contrast to the exclusively North American plastomenin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissemys
''Lissemys'' is a genus of softshell turtles in the subfamily Cyclanorbinae of the 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 extinct fossil species have been described for this genus, such as ''Lissemys piramensis'' , from Piram Island, India, but these are largely considered ''nomen dubia''. However, the extant Indian flapshell turtle (''L. punctata'') is known from fossils from as early as the Miocene. ''Nota bene'': A binomial authority In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ... i ... [...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'': A binomial authority In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ... 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 se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger 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, Australia and Ant ... [...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'': A binomial authority In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ... 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
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. 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. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists 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. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongolia
Mongolia; Mongolian script: , , ; lit. "Mongol Nation" or "State of Mongolia" () is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of , with a population of just 3.3 million, making it the world's most sparsely populated sovereign nation. Mongolia is the world's largest landlocked country that does not border a closed 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 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, and others. In 1206, Genghis Khan founded the Mongol Empire, which became the largest contiguous land empire in history. His grandson Kublai Khan conquered China proper and established the Yuan dynasty. After the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igor G
Igor may refer to: People * Igor (given name), an East Slavic given name and a list of people with the name * Mighty Igor (1931–2002), former American professional wrestler * Igor Volkoff, a professional wrestler from NWA All-Star Wrestling * Igorrr, (born 1984) a French musician Fictional characters * Igor (character), a stock character * Igor Karkaroff, character in the ''Harry Potter'' series * Igor, the eagle in ''Count Duckula'' * Igor, the first enemy character in fighting game ''Human Killing Machine'' * Igor, a baboon with shape-shifting powers in Marvel comics (see List of fictional monkeys) * Igor, a reoccurring character in the ''Persona'' series * Igor, a character in ''Young Frankenstein'' * Igor Nevsky, an assassin in ''Air Force One'' (film) Arts, entertainment, and media * ''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 released C ... [...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''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
