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Achatinella Apexfulva
''Achatinella apexfulva'' is a reportedly extinct species of colorful, tropical, arboreal pulmonate land snail in the family Achatinellidae, once present on Oahu, Hawaii. ''A. apexfulva'' is the type species of the genus ''Achatinella''. The specific name, apexfulva, meaning "yellow-tipped", refers to the yellow tip of the snail's shell. Taxonomy The family Achatinellidae, to which ''Achatinella apexfulva'' belongs, represents a diverse adaptive radiation. All species of tree-snail in Hawaii are believed to have come from a single ancestral snail. How that ancestral snail made the trip across the ocean is unknown. A longstanding theory is that a bird carried a notably smaller ancestor across the ocean and dropped it on the islands, as bird mediated dispersal has been documented in other snail species. Alternative theories include that it floated across the ocean on a mat of debris, or that it island-hopped across the Pacific in a combination of the theories. Within the Achatine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Dixon (Royal Navy Officer)
George Dixon (1748 – 11 November 1795) was an English sea captain, explorer, and maritime fur trader. George Dixon was "born in Leath Ward, a native of Kirkoswald". The son of Thomas Dixon, he was baptised in Kirkoswald on 8 July 1748. He served under Captain Cook in his third voyage, on , as armourer. In the course of the voyage he learned about the commercial possibilities along the North West Coast of America. History has not served Dixon well; for he is the least known of those who served and or were taught by Captain Cook and is only rarely mentioned in history books. When he is mentioned, he is relegated to a minor figure, overshadowed by the more dramatic figures of Cook and William Bligh, another officer on Cook's ill-fated third trip. In 1782, George Dixon was engaged by William Bolts. The ' newspaper of 29 June 1782 carried a report from Fiume that, "in the early days of this month, Mr. von Bolts, Director of the Triestine East India Company, together with the Engl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackson's Chameleon
Jackson's chameleon (''Trioceros jacksonii''), also known as Jackson's horned chameleon, three-horned chameleon or Kikuyu three-horned chameleon, is a species of chameleon (family Chamaeleonidae) native to East Africa, but also introduced to Hawaii, Florida, and California.Spawls S, Howell K, Drewes RC, Ashe J (2002). ''A Field Guide to the Reptiles and Amphibian of East Africa''. Academic Press. pp. 227-228. Global Invasive Species Database. (2010). Chamaeleo jacksonii (reptile)'' Retrieved 16 November 2014.California Herps: A Guide to the Amphibians and Reptiles of California. '' Retrieved 20 April 2017. Taxonomy Jackson's chameleon was described by Belgian-British zoologist George Albert Boulenger in 1896. (''Chamaeleon jacksonii'', new species). Etymology The generic name, ''Trioceros'', is derived from the Greek τρί- (''tri-'') meaning "three" and κέρας (''kéras'') meaning "horns". This is in reference to the three horns found on the heads of males. The specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ESA Endangered Species
, owners = , headquarters = Paris, Île-de-France, France , coordinates = , spaceport = Guiana Space Centre , seal = File:ESA emblem seal.png , seal_size = 130px , image = Views in the Main Control Room (12052189474).jpg , size = , caption = , acronym = , established = , employees = 2,200 , administrator = Director General Josef Aschbacher , budget = €7.2 billion (2022) , language = English and French (working languages) , website = , logo = European Space Agency logo.svg , logo_caption = Logo , image_caption = European Space Operations Centre (ESOC) Main Control Room The European Space Agency (ESA; french: Agence spatiale européenne , it, Agenzia Spaziale Europea, es, Agencia Espacial Europea ASE; german: Europäische Weltraumorganisation) is an intergovernmental organisation of 22 member states dedicated to the exploration of space. Established in 1975 and headquartered in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Articles Created By Polbot
Taxonomy is the practice and science of categorization or classification (general theory), classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. Among other things, a taxonomy can be used to organize and index knowledge (stored as documents, articles, videos, etc.), such as in the form of a library classification system, or a Taxonomy for search engines, search engine taxonomy, so that users can more easily find the information they are searching for. Many taxonomies are hierarchy, hierarchies (and thus, have an intrinsic tree structure), but not all are. Originally, taxonomy referred only to the categorisation of organisms or a particular categorisation of organisms. In a wider, more general sense, it may refer to a categorisation of things or concepts, as well as to the principles underlying such a categorisation. Taxonomy organizes taxonomic uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropods Described In 1789
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and reproduct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fauna Of Hawaii
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Of Hawaii
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods (s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achatinella
''Achatinella'' is a tropical genus of colorful land snails in the monotypic Achatinellidae subfamily ''Achatinellinae''. Species are arboreal pulmonate gastropod mollusks with some species called Oʻahu tree snails or kāhuli in the Hawaiian language. ''Achatinella'' species are all endemic to the island of Oahu in Hawaii, and all remaining extant species are endangered. They were once abundant and were mentioned extensively in Hawaiian folklore and songs, and their shells were used in lei and other ornaments. Many of the species are sinistral or left-handed chirality in their spiral shell coiling, whereas most gastropod shells are dextral, with a right handed spiral. Distribution There were 41 species of ''Achatinella'' endemic to the Hawaiian island of Oʻahu, though only 13 species survive. Some species have less than 50 remaining individuals, and others have +300; many species fall in between. Conservation status All 13 species are listed under United States feder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endling
An endling is the last known individual of a species or subspecies. Once the endling dies, the species becomes extinct. The word was coined in correspondence in the scientific journal ''Nature''. Alternative names put forth for the last individual of its kind include ender and terminarch. The word relict may also be used, but usually refers to a population, rather than an individual, that is the last of a species. Usage The 4 April 1996 issue of ''Nature'' published a correspondence in which commentators suggested that a new word, ''endling'', be adopted to denote the last individual of a species. The 23 May issue of ''Nature'' published several counter-suggestions, including ''ender'', ''terminarch'', and ''relict''. The word ''endling'' appeared on the walls of the National Museum of Australia in ''Tangled Destinies'', a 2001 exhibition by Matt Kirchman and Scott Guerin, about the relationship between Australian peoples and their land. In the exhibition, the definition, as i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinta Island Tortoise
The Pinta Island tortoise (''Chelonoidis niger ''), also known as the Pinta giant tortoise, Abingdon Island tortoise, or Abingdon Island giant tortoise, was a subspecies of Galápagos tortoise native to Ecuador's Pinta Island. The subspecies was described by Albert Günther in 1877 after specimens arrived in London. By the end of the 19th century, most of the Pinta Island tortoises had been wiped out due to hunting. By the mid-20th century, the subspecies was assumed to be extinct until a single male was discovered on the island in 1971. Efforts were made to mate the male, named Lonesome George, with other subspecies, but no viable eggs resulted. Lonesome George died on 24 June 2012, and the subspecies was believed to have become extinct with his death. However, 17 first-generation hybrids were reported in 2012 from Wolf Volcano on Isabela Island during a trip by Yale University researchers. As these specimens were juveniles, their parents might still be alive. The subspecies is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lonesome George
Lonesome George ( es, Solitario George or , 1910 – June 24, 2012) was a male Pinta Island tortoise (''Chelonoidis niger abingdonii'') and the last known individual of the subspecies. In his last years, he was known as the rarest creature in the world. George serves as an important symbol for conservation efforts in the Galápagos Islands and throughout the world. Discovery George was first seen on the island of Pinta on November 1, 1971, by Hungarian malacologist József Vágvölgyi. The island's vegetation had been devastated by introduced feral goats, and the indigenous ''C. n. abingdonii'' population had been reduced to a single individual. It is thought that he was named after a character played by American actor George Gobel. He was relocated for his own safety to the Charles Darwin Research Station on Santa Cruz Island, where he spent his life under the care of Fausto Llerena, for whom the tortoise breeding center is named. It was hoped that more Pinta Islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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