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Mako Shark
''Isurus'' (meaning "equal tail") is a genus of mackerel sharks in the family Lamnidae, commonly known as the mako sharks. They are largely pelagic, and are fast, predatory fish capable of swimming at speeds of up to . Fossil history and evolution Although fossil teeth of ''Isurus'' have been reported from as early as the Late Cretaceous, they are likely to be of a shark with a similar dentition, '' Cretoxyrhina''; since at one point they were considered to be the same (now defunct) genus ''Oxyrhina'', and modern referrals to ''Isurus'' in the Cretaceous are scant. The earliest appearance of ''Isurus'' proper seems to be during the Oligocene with ''Isurus desori''. There has been much debate and speculation about the evolutionary origin and relationships between ''Isurus'' and its closest relatives, including the extant great white shark (''Carcharodon carcharias''). Molecular clock analyses place the last common ancestor of ''Isurus'' and '' Carcharodon'' between 43–60 mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Oligocene
The Rupelian is, in the geologic timescale, the older of two age (geology), ages or the lower of two stage (stratigraphy), stages of the Oligocene epoch (geology), Epoch/series (stratigraphy), Series. It spans the time between . It is preceded by the Priabonian Stage (part of the Eocene) and is followed by the Chattian Stage. Name The stage is named after the small river Rupel in Belgium, a tributary to the Scheldt. The Belgian Rupel Group derives its name from the same source. The name Rupelian was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1850. The separation between the group (stratigraphy), group and the stage was made in the second half of the 20th century, when stratigraphers saw the need to distinguish between lithostratigraphy, lithostratigraphic and chronostratigraphy, chronostratigraphic names. Stratigraphic definition The base of the Rupelian Stage (which is also the base of the Oligocene Series) is at the extinction of the foram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longfin Mako Shark
The longfin mako shark (''Isurus paucus'') is a species of mackerel shark in the family Lamnidae, with a probable worldwide distribution in temperate and tropical waters. An uncommon species, it is typically lumped together under the name "mako" with its better-known relative, the shortfin mako shark (''I. oxyrinchus''). The longfin mako is a pelagic species found in moderately deep water, having been reported to a depth of . Growing to a maximum length of , the slimmer build and long, broad pectoral fins of this shark suggest that it is a slower and less active swimmer than the shortfin mako. Longfin mako sharks are predators that feed on small schooling bony fishes and cephalopods. Whether this shark is capable of elevating its body temperature above that of the surrounding water like the other members of its family is uncertain, though it possesses the requisite physiological adaptations. Reproduction in this species is aplacental viviparous, meaning the embryos hatch from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark Genera
Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the division Selachii and are the sister group to the Batomorphi ( rays and skates). Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as ''Cladoselache'' and ''Doliodus'' first appeared in the Devonian Period (419–359 million years), though some fossilized chondrichthyan-like scales are as old as the Ordovician, Late Ordovician (458–444 million years ago). The earliest confirmed modern sharks (Selachii) are known from the Early Jurassic around , with the oldest known member being ''Agaleus'', though records of true sharks may extend back as far as the Permian. Sharks range in size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extant Late Cretaceous First Appearances
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Extant or least concern is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, such as an extant species * Extant Theatre Company, a disability arts organisation * ''Extant'' (TV series), an American television series * Hank Hall, also known as Extant, a DC Comics supervillain See also * Extent (other) Extent may refer to: Computing * Extent (file systems), a contiguous region of computer storage medium reserved for a file * Extent File System, a discontinued file system implementation named after the contiguous region * Extent, a chunk of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isurus
''Isurus'' (meaning "equal tail") is a genus of mackerel sharks in the family Lamnidae, commonly known as the mako sharks. They are largely pelagic, and are fast, predatory fish capable of swimming at speeds of up to . Fossil history and evolution Although fossil teeth of ''Isurus'' have been reported from as early as the Late Cretaceous, they are likely to be of a shark with a similar dentition, '' Cretoxyrhina''; since at one point they were considered to be the same (now defunct) genus ''Oxyrhina'', and modern referrals to ''Isurus'' in the Cretaceous are scant. The earliest appearance of ''Isurus'' proper seems to be during the Oligocene with ''Isurus desori''. There has been much debate and speculation about the evolutionary origin and relationships between ''Isurus'' and its closest relatives, including the extant great white shark (''Carcharodon carcharias''). Molecular clock analyses place the last common ancestor of ''Isurus'' and '' Carcharodon'' between 43–60 mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark Meat
Shark meat is a seafood consisting of the flesh of sharks. Several sharks are fished for human consumption, such as porbeagles, shortfin mako shark, requiem shark, and thresher shark, among others. Shark meat is popular in Asia, where it is often consumed Drying (food), dried, Smoking (cooking), smoked, or Salting (food), salted. The largest consumer of shark meat in the World is Brazil, but it is also consumed regularly in Iceland, Japan, Australia, parts of India, parts of Canada, Sri Lanka, areas of Africa, Mexico and Yemen. Sharks have been eaten at least since the Late Bronze Age (1550–1130 BC), for example in the Levant. Preparation Unprocessed shark meat may have a strong odor of ammonia, due to the high urea content that develops as the fish decomposes. The urea content and ammonia odor can be reduced by Marination, marinating the meat in liquids such as lemon juice, vinegar, milk, or saltwater. Preparation methods include slicing the meat into Fish steak, steaks and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Prehistoric Cartilaginous Fish
This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all Genus, genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely vernacular terms, genera that are now considered invalid, doubtful (nomina dubia), or were not formally published (nomina nuda), as well as junior synonyms of more established names, and genera that are no longer considered to be cartilaginous fish. It includes all commonly accepted genera. This list currently contains 804 generic names. * Extinction, Extinct genera are marked by a dagger (†). * Extant taxon genera are bolded. Naming conventions and terminology Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include: * Synonym (zoology), Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isurus Retroflexus
''Isurus'' (meaning "equal tail") is a genus of mackerel sharks in the family Lamnidae, commonly known as the mako sharks. They are largely pelagic, and are fast, predatory fish capable of swimming at speeds of up to . Fossil history and evolution Although fossil teeth of ''Isurus'' have been reported from as early as the Late Cretaceous, they are likely to be of a shark with a similar dentition, '' Cretoxyrhina''; since at one point they were considered to be the same (now defunct) genus ''Oxyrhina'', and modern referrals to ''Isurus'' in the Cretaceous are scant. The earliest appearance of ''Isurus'' proper seems to be during the Oligocene with ''Isurus desori''. There has been much debate and speculation about the evolutionary origin and relationships between ''Isurus'' and its closest relatives, including the extant great white shark (''Carcharodon carcharias''). Molecular clock analyses place the last common ancestor of ''Isurus'' and '' Carcharodon'' between 43–60 mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Agassiz
Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he received a PhD at Erlangen and a medical degree in Munich. After studying with Georges Cuvier and Alexander von Humboldt in Paris, Agassiz was appointed professor of natural history at the University of Neuchâtel. He emigrated to the United States in 1847 after visiting Harvard University. He went on to become professor of zoology and geology at Harvard, to head its Lawrence Scientific School, and to found its Museum of Comparative Zoology. Agassiz is known for observational data gathering and analysis. He made institutional and scientific contributions to zoology, geology, and related areas, including multivolume research books running to thousands of pages. He is particularly known for his contributions to ichthyological classification, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isurus Desori
''Isurus desori'' or "Desori shark", or "Desori mako shark" is an extinct species of Mako shark, that lived in the Oligocene and Middle Miocene, between 34 and 11 million years ago. It measured long. Diet The ''Isurus desori'' hunted squids, fish and marine mammals. The fossil of ''I. desori'' was discovered in the Chesapeake Bay region. Taxonomy The ''I. desori'' belongs to the family Lamnidae. It is classified in the genus '' Isurus'', and it is believed that it was the ancestor of the present-day mako shark (''Isurus oxyrinchus''). It is believed to be related to '' C. hastalis'', and '' C. xiphodon'', as well as the Mako shark (''Isurus oxyrinchus''). Scientists believe that ''I. desori'' belongs to the subfamily Isuridae, where it evolved into the only two contemporary species, '' I. paucus'' and '' I. oxyrinchus'', the only surviving species of the genus Isurus. It was once believed that ''I. desori'' belonged to the genus '' Oxyrhina'', which is now considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Darío José Guitart-Manday
Dario is a masculine given name, etymologically related to Darius. Given name * Dario Allevi (born 1965), Italian politician *Dario Argento (born 1940), Italian film director * Dario Badinelli (born 1946), Italian triple jumper *Dario Bellezza (1944–1996), Italian poet * Dario Benuzzi (born 1946), Italian test driver * Darío Botero (1938–2010), Colombian writer and philosopher * Dario Campeotto (1939–2023), Danish singer, actor, entertainer * Dario Cologna (born 1986), Swiss cross-country skier * Dario Dainelli (born 1979), Italian footballer * Dario Franchitti (born 1973), Scottish Indianapolis 500 winner and IndyCar Series champion * Dario Fo (1926–2016), Italian Nobel prize winner * Dario García (born 1968), Argentine judoka *Dario Hübner (born 1967), Italian footballer * Dario Item (born 1972), Swiss and Antiguan and Barbudan diplomat * Dario José dos Santos (born 1946), Brazilian footballer * Dario Hunt (born 1989), American basketball player *Dario Lari (born 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isurus Paucus
The longfin mako shark (''Isurus paucus'') is a species of mackerel shark in the family Lamnidae, with a probable worldwide distribution in temperate and tropical waters. An uncommon species, it is typically lumped together under the name "mako" with its better-known relative, the shortfin mako shark (''I. oxyrinchus''). The longfin mako is a pelagic species found in moderately deep water, having been reported to a depth of . Growing to a maximum length of , the slimmer build and long, broad pectoral fins of this shark suggest that it is a slower and less active swimmer than the shortfin mako. Longfin mako sharks are predators that feed on small schooling bony fishes and cephalopods. Whether this shark is capable of elevating its body temperature above that of the surrounding water like the other members of its family is uncertain, though it possesses the requisite physiological adaptations. Reproduction in this species is aplacental viviparous, meaning the embryos hatch from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
