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Chirodactylus Grandis
''Chirodactylus'' is a genus of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs. They are native to the Atlantic, Indian and eastern Pacific oceans off southern Africa and South America. Taxonomy ''Chirodactylus'' was described as a genus in 1862 by the American ichthyologist Theodore Nicholas Gill with the South American ''Cheilodactylus antonii'', which had been described by Achille Valenciennes in 1833, as the type species by monotypy. Gill subsequently included two other species in ''Chirodactylus'', ''C. grandis'' and ''C, variegatus''. C. antonii was later shown to be a synonym of ''Cheilodactylus variegatus''. Chirodactylus was largely regarded as a synonym of Cheilodactylus until 1980 when the South African ichthyologist Margaret M. Smith resurrected it to include the three southern African species ''C. brachydactylus'', ''C. grandis'' and ''C. jessicalenorum'', as well as ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore Nicholas Gill
Theodore Nicholas Gill (March 21, 1837 – September 25, 1914) was an American ichthyologist, mammalogist, malacologist and librarian. Career Born and educated in New York City under private tutors, Gill early showed interest in natural history. He was associated with J. Carson Brevoort in the arrangement of the latter's entomological and ichthyological collections before going to Washington D.C. in 1863 to work at the Smithsonian Institution. He catalogued mammals, fishes and mollusks most particularly although maintaining proficiency in other orders of animals. He was librarian at the Smithsonian and also senior assistant to the Library of Congress. He was elected as a member of the American Philosophical Society in 1867. Gill was professor of zoology at George Washington University. He was also a member of the Megatherium Club at the Smithsonian Institution in Washington, D.C. Fellow members frequently mocked him for his vanity. He was president of the American Association f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georges Cuvier
Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French natural history, naturalist and zoology, zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure in natural sciences research in the early 19th century and was instrumental in establishing the fields of comparative anatomy and paleontology through his work in comparing living animals with fossils. Cuvier's work is considered the foundation of vertebrate paleontology, and he expanded Linnaean taxonomy by grouping classes into phylum, phyla and incorporating both fossils and living species into the classification. Cuvier is also known for establishing extinction as a fact—at the time, extinction was considered by many of Cuvier's contemporaries to be merely controversial speculation. In his ''Essay on the Theory of the Earth'' (1813) Cuvier proposed that now-extinct species had been wiped out by periodic catastrophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chirodactylus
''Chirodactylus'' is a genus of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs. They are native to the Atlantic, Indian and eastern Pacific oceans off southern Africa and South America. Taxonomy ''Chirodactylus'' was described as a genus in 1862 by the American ichthyologist Theodore Nicholas Gill with the South American ''Cheilodactylus antonii'', which had been described by Achille Valenciennes in 1833, as the type species by monotypy. Gill subsequently included two other species in ''Chirodactylus'', ''C. grandis'' and ''C, variegatus''. C. antonii was later shown to be a synonym of ''Cheilodactylus variegatus''. Chirodactylus was largely regarded as a synonym of Cheilodactylus until 1980 when the South African ichthyologist Margaret M. Smith resurrected it to include the three southern African species ''C. brachydactylus'', ''C. grandis'' and ''C. jessicalenorum'', as well as ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Length
Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal (tail) fin. * Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes (lampreys), and (usually) Elasmobranchii (sharks and rays), as well as some other fishes. Total length me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines serve an important role in schooling behavior, predation, and orientation. Fish can use their lateral line system to follow the vortices produced by fleeing prey. Lateral lines are usually visible as faint lines of pores running lengthwise down each side, from the vicinity of the gill covers to the base of the tail. In some species, the receptive organs of the lateral line have been modified to function as electroreceptors, which are organs used to detect electrical impulses, and as such, these systems remain closely linked. Most amphibian larvae and some fully aquatic adult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectoral Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod to lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans (whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against rollin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheilodactylus Variegatus
''Chirodactylus variegatus'', the Peruvian morwong or bilagai, is a species of marine ray-finned fish traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs. It is found in the southeastern Pacific Ocean off the western coast of South America. Taxonomy ''Chirodactylus variegatus'' was first formally described in 1833 as ''Cheilodactylus variegatus'' by the French zoologist Achille Valenciennes with the type locality given as Valparaíso in Chile. When the American ichthyologist Theodore Nicholas Gill initially described the genus ''Chirodactylus'' in 1962 he included ''Cheilodactylus antonii'' as its type species, this was later shown to be a synonym for ''C. variegatus''. Genetic and morphological analyses strongly support the validity of ''Chirodactylus'' as a genus and that the genus should be placed in the family Latridae. The 5th edition of Fishes of the World, however, retains the genus within the family C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chirodactylus Jessicalenorum
''Chirodactylus jessicalenorum'', the natal fingerfin, is a species of ray-finned fish within the family Cheilodactylidae. It is found in the Indian Ocean off the coast of South Africa, at depths of 3 to 20 meters below sea level. Biology ''Chirodactylus jessicalenorum'' can grow to a maximum length of 50 centimeters, although it is more commonly found at a length of 30 centimeters. Its body is scarlet in coloring, with a redish black blotch at the pectoral base. It lives in rocky banks off shore lines, where it feeds on small invertabrates such as worms, crabs, and mollusks, although it can occasionally eat squid and small fish as well. Conservation ''Chirodactylus jessicalenorum'' is faces minor commercial importance, as it is mainly caught through the use of spears where it is then sold fresh in local fish markets. It also faces bycatch and is a game fish, although it isn't known how much these impact the overall population. No conservation efforts have been made so far ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Günther
Albert Karl Ludwig Gotthilf Günther FRS, also Albert Charles Lewis Gotthilf Günther (3 October 1830 – 1 February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive reptile taxonomist (after George Albert Boulenger) with more than 340 reptile species described. Early life and career Günther was born in Esslingen in Swabia (Württemberg). His father was a ''Stiftungs-Commissar'' in Esslingen and his mother was Eleonora Nagel. He initially schooled at the Stuttgart Gymnasium. His family wished him to train for the ministry of the Lutheran Church for which he moved to the University of Tübingen. A brother shifted from theology to medicine, and he, too, turned to science and medicine at Tübingen in 1852. His first work was "''Ueber den Puppenzustand eines Distoma''". He graduated in medicine with an M.D. from Tübingen in 1858, the same year in which he published a handbook of zoology for students of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chirodactylus Grandis
''Chirodactylus'' is a genus of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs. They are native to the Atlantic, Indian and eastern Pacific oceans off southern Africa and South America. Taxonomy ''Chirodactylus'' was described as a genus in 1862 by the American ichthyologist Theodore Nicholas Gill with the South American ''Cheilodactylus antonii'', which had been described by Achille Valenciennes in 1833, as the type species by monotypy. Gill subsequently included two other species in ''Chirodactylus'', ''C. grandis'' and ''C, variegatus''. C. antonii was later shown to be a synonym of ''Cheilodactylus variegatus''. Chirodactylus was largely regarded as a synonym of Cheilodactylus until 1980 when the South African ichthyologist Margaret M. Smith resurrected it to include the three southern African species ''C. brachydactylus'', ''C. grandis'' and ''C. jessicalenorum'', as well as ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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