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Centrochelys Robusta
''Centrochelys'' is a genus of tortoise. It contains one extant species and several extinct species: * '' Centrochelys atlantica'' * ''Centrochelys burchardi'' * ''Centrochelys marocana'' * '' Centrochelys robusta'' * '' Centrochelys vulcanica'' * ''Centrochelys sulcata'' (African spurred tortoise) The largest species, ''C. marocana'', reached in carapace length. The conservation status of ''Centrochelys sulcata '' has been changed from Vulnerable to Threatened with extinction by the International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ... because of seasonal wildfires, the international pet trade, and competition for food and space with other domestic animals. References {{Testudinidae Turtle genera Reptile genera with one livin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Sulcata
The African spurred tortoise (''Centrochelys sulcata''), also called the sulcata tortoise, is a species of tortoise inhabiting the southern edge of the Sahara desert in Africa. It is the largest mainland species of tortoise in the world, and the third-largest in the world. It is the last remaining species in its genus, Centrochelys, with the five other species in the family already extinct. Taxonomy and etymology The African spurred tortoise is apart of the: * Animalia Kingdom (biology), kingdom * Bilateral Subkingdom * Deuterostomia Infrakingdom * Chordata Phylum * Vertebrata Subphylum * Gnathostomata Subphylum, Infraphylum * Tetrapoda superclass * Reptilia Class (biology), class * Testudines Order (biology), order * Crytodira Order (biology), suborder * Testudinoidea Superfamily (biology), superfamily * Testudinidae Family (biology), family * Centrochelys genus The taxonomic species name is Centrochelys sulcata and is otherwise known as C. sulcata. Its Species, specific name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Edward Gray
John Edward Gray, FRS (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being blackballed by the Linnean Society of London, Gray shifted his interest from botany to zoology. He began his zoologica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus (biology)
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below 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 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 of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tortoise
Tortoises () are reptiles of the family Testudinidae of the order Testudines (Latin: ''tortoise''). Like other turtles, tortoises have a turtle shell, shell to protect from predation and other threats. The shell in tortoises is generally hard, and like other members of the suborder Cryptodira, they retract their necks and heads directly backward into the shell to protect them. Tortoises can vary in size with some species, such as the Galápagos tortoise, Galápagos giant tortoise, growing to more than in length, whereas others like the Chersobius signatus, Speckled cape tortoise have shells that measure only long. Several lineages of tortoises Giant tortoise, have independently evolved very large body sizes in excess of 100 kg, including the Galápagos tortoise, Galapagos giant tortoise and the Aldabra giant tortoise. They are usually Diurnality, diurnal animals with tendencies to be crepuscular depending on the ambient temperatures. They are generally reclusive animals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Atlantica
''Centrochelys atlantica'' is an extinct species of tortoise that lived in the Pleistocene. It was first recorded in the volcanic crater on Sal, Cape Verde.Chevalier, A., Joleaud , L., and Petit, G. 1935. Les dépôts quaternaires de l’ancien cratère de Pedra de Lume (île de Sal, archipel du Cap-Vert). ''Comptes Rendus des Séances de l’Académie des Sciences, Paris'' 200:1334–1335. It was initially identified as similar to the extant ''Testudo calcarata'' (= ''Centrochelys sulcata''). The species is no longer present anywhere in the Cape Verde islands. It has since been described as a new species, differentiated from ''C. sulcata'' by its smaller size and lesser robusticity. It does not seem there is any evidence this species came into contact with humans. Kehlmaier ''et al.'' (2021) identified the type material of this species as belonging to a specimen of the red-footed tortoise The red-footed tortoise (''Chelonoidis carbonarius'') is a species of tortoise from n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Burchardi
The Tenerife giant tortoise (''Centrochelys burchardi'') is an extinct species of cryptodire turtle in the family Testudinidae endemic to the island of Tenerife, in the Canary Islands. Characteristics It was a large tortoise, similar to those currently found in some oceanic islands like the Galapagos Islands in the Pacific Ocean and Aldabra and the Seychelles in the Indian Ocean. The earliest remains of ''C. burchardi'' found on Tenerife date from the Miocene epoch. This tortoise is thought to have inhabited the island until the Upper Pleistocene, when volcanic activity at that time exterminated them long before humans arrived during the Holocene. Most fossils are of bones and shells, as well as a nest of fossilized eggs found in volcanic soil in the south of Tenerife, in the present municipality of Adeje. This species of giant tortoise was described in 1926 by Ernst Ahl, the first time a giant tortoise endemic to the Canary Islands described. Another extinct tortoise spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Marocana
''Centrochelys'' is a genus of tortoise. It contains one extant species and several extinct species: * '' Centrochelys atlantica'' * ''Centrochelys burchardi'' * '' Centrochelys marocana'' * '' Centrochelys robusta'' * '' Centrochelys vulcanica'' * ''Centrochelys sulcata'' (African spurred tortoise) The largest species, ''C. marocana'', reached in carapace length. The conservation status of ''Centrochelys sulcata '' has been changed from Vulnerable to Threatened with extinction by the International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ... because of seasonal wildfires, the international pet trade, and competition for food and space with other domestic animals. References {{Testudinidae Turtle genera Reptile genera with one livi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Robusta
''Centrochelys'' is a genus of tortoise. It contains one extant species and several extinct species: * '' Centrochelys atlantica'' * ''Centrochelys burchardi'' * ''Centrochelys marocana'' * '' Centrochelys robusta'' * '' Centrochelys vulcanica'' * ''Centrochelys sulcata'' (African spurred tortoise) The largest species, ''C. marocana'', reached in carapace length. The conservation status of ''Centrochelys sulcata '' has been changed from Vulnerable to Threatened with extinction by the International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ... because of seasonal wildfires, the international pet trade, and competition for food and space with other domestic animals. References {{Testudinidae Turtle genera Reptile genera with one livin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrochelys Vulcanica
The Gran Canaria giant tortoise (''Centrochelys vulcanica'') is an extinct species of cryptodire turtle in the family Testudinidae endemic to the island of Gran Canaria, in the Canary Islands. Characteristics This is one of the two described species of giant tortoises that inhabited the Canary Islands from the Miocene to the upper Pleistocene. The other species is '' C. burchardi'', from the island of Tenerife. ''C. vulcanica'' was described by López-Jurado & Mateo in 1993. It is believed that the ancestors of these two species of giant tortoises reached the Canary Islands from North Africa. The majority of ''C. vulcanica'' fossils are of eggs and nests ranging in age from the Miocene until Pliocene. Bones and shells are known from the Miocene to the Upper Pleistocene. The maximum shell length is up to 61 centimeters, make it slightly smaller than ''C. burchardi'', which had a shell length range of 65 to 94 cm. Fossilized tortoise eggs have been found in the island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conservation Status
The conservation status of a group of organisms (for instance, a species) indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use. International systems IUCN Red List of Threatened Species The IUCN Red List of Threatened Species is the best known worldwide conservation status listing and ranking system. Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation. Also included are species that have gone ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerable Species
A vulnerable species is a species which has been Conservation status, categorized by the International Union for Conservation of Nature as being threatened species, threatened with extinction unless the circumstances that are threatened species, threatening its survival and reproduction improve. Vulnerability is mainly caused by habitat loss or destruction of the species' home. Vulnerable habitat or species are monitored and can become increasingly threatened. Some species listed as "vulnerable" may be common in captivity (animal), captivity, an example being the military macaw. There are currently 5196 animals and 6789 plants classified as Vulnerable, compared with 1998 levels of 2815 and 3222, respectively. Practices such as cryoconservation of animal genetic resources have been enforced in efforts to conserve vulnerable breeds of livestock specifically. Criteria The International Union for Conservation of Nature uses several criteria to enter species in this category. A tax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Threatened Species
Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensation'', a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment. IUCN definition The International Union for Conservation of Nature (IUCN) is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened: *Vulnerable species *Endangered species * Critically endangered species Less-than-threatened categories are near threatened, least concern, and the no longer assigned category of conservation dependent. Species which have not been evaluated (NE), or do not have sufficient data ( data deficient) also are not considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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