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Chelus Colombianus
''Chelus'' is a genus of large freshwater turtles found in tropical South America. Formerly considered to be a monotypic genus, it now consists of two extant species after '' Chelus orinocensis'' was identified in 2020 from a genetic analysis. Evolution Fossils of the extinct †'' C. colombianus'' have been found in Venezuela, Colombia, and Brazil, including a skull dating to the early Miocene (~ 16 m.y.) of the Castilletes Formation, Cocinetas Basin, in Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel .... The fossil shows that the skull morphology of ''Chelus'' has been almost unchanged since the Miocene. Species There are two extant recognized species in this genus and one extinct species: *'' Chelus fimbriatus'' – Amazon mata mata *'' Chelus orinocensis'' †... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
André Marie Constant Duméril
André Marie Constant Duméril (1 January 1774 – 14 August 1860) was a French zoologist. He was professor of anatomy at the National Museum of Natural History (France), Muséum national d'histoire naturelle from 1801 to 1812, when he became professor of herpetology and ichthyology. His son Auguste Duméril was also a zoologist, and the author citation (zoology), author citation Duméril is used for both André and his son. Life André Marie Constant Duméril was born on 1 January 1774 in Amiens and died on 14 August 1860 in Paris. He became a doctor at a young age, obtaining, at 19 years, the ''prévot'' of anatomy at the medical school of Rouen. In 1800, he left for Paris and collaborated in the drafting of the comparative anatomy lessons of Georges Cuvier. He replaced Cuvier at the Central School of the Panthéon, Paris, Panthéon and had, as his colleague, Alexandre Brongniart. In 1801, he gave courses to the medical school of Paris. Under the Bourbon Restoration in Fran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turtle
Turtles are reptiles of the order (biology), order Testudines, characterized by a special turtle shell, shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked turtles), which differ in the way the head retracts. There are 360 living and recently extinct species of turtles, including land-dwelling tortoises and freshwater terrapins. They are found on most continents, some islands and, in the case of sea turtles, much of the ocean. Like other Amniote, amniotes (reptiles, birds, and mammals) they breathe air and do not lay eggs underwater, although many species live in or around water. Turtle shells are made mostly of bone; the upper part is the domed Turtle shell#Carapace, carapace, while the underside is the flatter plastron or belly-plate. Its outer surface is covered in scale (anatomy), scales made of keratin, the material of hair, horns, and claws. The carapace bones deve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion of the Americas. South America is bordered on the west by the Pacific Ocean, on the north and east by the Atlantic Ocean, and to the south by the Drake Passage; North America and the Caribbean Sea lie to the northwest. The continent includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territory, dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one administrative division, internal territory: French Guiana. The Dutch Caribbean ABC islands (Leeward Antilles), ABC islands (Aruba, Bonaire, and Curaçao) and Trinidad and Tobago are geologically located on the South-American continental shel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Genus
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelus Orinocensis
''Chelus orinocensis'', the Orinoco mata mata, is a species of freshwater turtle found in northern South America in the Orinoco, upper Rio Negro– Branco and Essequibo basins, and in Trinidad. It was split off from the very similar '' Chelus fimbriata'' in 2020. Taxonomy A genetic analysis of the mata mata Matamata () is a town in Waikato, New Zealand. It is located near the base of the Kaimai Ranges, and is a thriving farming area known for Thoroughbred horse breeding and training pursuits. It is part of the Matamata-Piako District, which tak ... was reported in 2020, which showed a deep split between two of its populations. The authors proposed that the mostly Orinoco population be assigned to a new species, ''Chelus orinocensis'', with the Amazon population retaining the '' Chelus fimbriatus'' species designation. However, ''Chelus fimbriatus'' is absent from the upper Rio Negro–Branco system (the northernmost part of the Amazon basin), which instead is inhabited ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetics
Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinians, Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene. Phenotypic trait, Trait inheritance and Molecular genetics, molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded to study the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the Cell (bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelus Colombianus
''Chelus'' is a genus of large freshwater turtles found in tropical South America. Formerly considered to be a monotypic genus, it now consists of two extant species after '' Chelus orinocensis'' was identified in 2020 from a genetic analysis. Evolution Fossils of the extinct †'' C. colombianus'' have been found in Venezuela, Colombia, and Brazil, including a skull dating to the early Miocene (~ 16 m.y.) of the Castilletes Formation, Cocinetas Basin, in Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel .... The fossil shows that the skull morphology of ''Chelus'' has been almost unchanged since the Miocene. Species There are two extant recognized species in this genus and one extinct species: *'' Chelus fimbriatus'' – Amazon mata mata *'' Chelus orinocensis'' †... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Miocene
The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages: the Aquitanian age, Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 annum, Ma to 15.97 ± 0.05 Ma (million years ago). It was preceded by the Oligocene epoch. As the climate started to get cooler, the landscape started to change. New mammals evolved to replace the extinct animals of the Oligocene epoch. The first members of the hyena and weasel family started to evolve to replace the extinct ''Hyaenodon'', entelodonts and bear-dogs. The chalicotheres survived the Oligocene epoch. A new genus of entelodont called ''Daeodon'' evolved in order to adapt to the new habitats and hunt the new prey animals of the Early Miocene epoch; it quickly became the top predator of North America. But it became extinct due to competition from ''Amphicyon'', a newcomer from Eurasia. ''Amphicyon'' bested ''Daeodon'' because the bear-dog's la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castilletes Formation
The Castilletes Formation (, N1c) is a fossiliferous geological formation of the Cocinetas Basin in the northernmost department of La Guajira, Colombia. The formation consists of fossiliferous mudstones, siltstones and medium-grained to conglomeratic fossiliferous lithic to quartzitic sandstones. The Castilletes Formation dates to the Neogene period; Burdigalian to Langhian stages, Colloncuran and Friasian in the SALMA classification, and has a maximum thickness of . Etymology The formation was defined by Rollins in 1965 and named after the village of Castilletes.Moreno et al., 2015, p.27 Description Lithologies The Castilletes Formation consists of fossiliferous mudstones, siltstones and medium-grained to conglomeratic fossiliferous lithic to quartzitic sandstones.Moreno et al., 2015, pp.27-32 Stratigraphy and depositional environment The Castilletes Formation overlies the Jimol Formation and is overlain by the Ware Formation. The age has been estimated to be Middl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cocinetas Basin
The Cocinetas Basin () is a small sedimentary basin of approximately in northeasternmost Colombia. The wikt:onshore, onshore pull-apart basin is located in the departments of Colombia, department of La Guajira Department, La Guajira at the border with Zulia, Venezuela. The basin is bound by three sets of hills; the SerranÃa de Jarara, SerranÃa Macuira and SerranÃa Cocinas, with the eastern boundary formed by the Gulf of Venezuela, part of the Caribbean Sea. The basin was formed during the Paleogene as a result of the eastward movement of the Caribbean Plate along the northern edge of the South American Plate, leading to the deposition of a Eocene, Middle Eocene to Pleistocene, Middle Pleistocene sedimentary sequence of conglomerate (geology), conglomerates, sandstones, siltstones, limestones and mudstones. In the Cocinetas Basin, several list of fossiliferous stratigraphic units of Colombia, fossiliferous stratigraphic units have been registered, providing an abundance of mari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colombia
Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuela to the east and northeast, Brazil to the southeast, Peru and Ecuador to the south and southwest, the Pacific Ocean to the west, and Panama to the northwest. Colombia is divided into 32 Departments of Colombia, departments. The Capital District of Bogotá is also the List of cities in Colombia by population, country's largest city hosting the main financial and cultural hub. Other major urban areas include MedellÃn, Cali, Barranquilla, Cartagena, Colombia, Cartagena, Santa Marta, Cúcuta, Ibagué, Villavicencio and Bucaramanga. It covers an area of 1,141,748 square kilometers (440,831 sq mi) and has a population of around 52 million. Its rich cultural heritage—including language, religion, cuisine, and art—reflects its history as a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelus Fimbriatus
Matamata () is a town in Waikato, New Zealand. It is located near the base of the Kaimai Ranges, and is a thriving farming area known for Thoroughbred horse breeding and training pursuits. It is part of the Matamata-Piako District, which takes in the surrounding rural areas, as well as Morrinsville and Te Aroha. State Highway 27 and the Kinleith Branch railway run through the town. The town has a population of as of A nearby farm was the location for the Hobbiton Movie Set in Peter Jackson's ''The Lord of the Rings''. The New Zealand government decided to leave the Hobbit holes built on location as tourist attractions. During the period between the filming of '' The Lord of the Rings: The Return of the King'' and '' The Hobbit: An Unexpected Journey'' they had no furniture or props, but could be entered with vistas of the farm viewed from inside them. A "Welcome to Hobbiton" sign has been placed on the main road. In 2011, parts of Hobbiton began to close in preparation for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
