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Atractosteus Atrox 5
''Atractosteus'' (from Greek ''atraktos'' (ἀτρακτὀς), 'spindle' and ''osteon'' (ὀστέον), 'bone') is a genus of gars in the family Lepisosteidae, with three extant species. It is one of two surviving gar genera alongside ''Lepisosteus''. The three surviving species are all widely separated from one another, with ''A. spatula'' being found in the south-central United States, ''A. tropicus'' in southern Mexico and Central America, and ''A. tristoechus'' in Cuba. Although generally inhabiting fresh water, they are tolerant of marine conditions. Evolution The genus first appeared during the Santonian stage of the Late Cretaceous, having diverged from ''Lepisosteus'' earlier in the Cretaceous. It quickly achieved a widespread distribution throughout the rest of the Cretaceous, being known from North America, South America and Europe. ''Atractosteus'' survived the Cretaceous-Paleogene extinction event, with one articulated fossil of the species '' A. grandei'' being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alligator Gar
The alligator gar (''Atractosteus spatula'') is a euryhaline ray-finned fish in the clade Ginglymodi of the infraclass Holostei , being most closely related to the bowfins. It is the largest species in the gar family (biology), family (Lepisosteidae), and is among the largest freshwater fishes in North America. The fossil record traces its group's existence back to the Early Cretaceous over 100 million years ago. Gars are often referred to as "primitive fishes" or "living fossils", because they have retained some Morphological (biology), morphological characteristics of their early ancestors, such as a spiral valve intestine, which is also common to the digestive system of sharks, and the ability to breathe in both air and water. Their common name was derived from their resemblance to the American alligator, particularly their broad snouts and long, sharp teeth. It is suggested that an alligator gar can grow up to in length. The body of an alligator gar is torpedo-shaped, usual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atractosteus Tristoechus
The Cuban gar (''Atractosteus tristoechus''), also known as the manjuarí, is a fish in the family Lepisosteidae. It is a tropical, freshwater species, although it also inhabits brackish water. It is found in rivers and lakes of western Cuba and the Isla de la Juventud. The flesh of the fish is edible, but the eggs are poisonous for humans.Lee, D.S., S.P. Platania and G.H. Burgess, 1983. Atlas of North American freshwater fishes, 1983 supplement. Occasional Papers of the North Carolina Biological Survey no. 1983-6. North Carolina State Museum of Natural History, Raleigh, N.C. 67 p. Cuban gar spawn seasonally in the floodplains of large rivers.Dean B. (1895) The early development of gar-pike and sturgeon. ''Journal of Morphology'' 11, 1–53. Behavior Cuban gar typically hunt alone and avoid other members of their species. The exception to this is during spawning season, when larger parties of around 20 gar form to hunt. Sometimes, the groups break up into smaller groups, and tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore 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, DC, in 1863 to work at the Smithsonian Institution. He catalogued mammals, fishes, and mollusks most particularly, although he maintained 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, DC. Fellow members frequently mocked him for his vanity. He was president of the American Asso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atractosteus Tropicus 1zz
''Atractosteus'' (from Greek ''atraktos'' (ἀτρακτὀς), 'spindle' and ''osteon'' (ὀστέον), 'bone') is a genus of gars in the family Lepisosteidae, with three extant species. It is one of two surviving gar genera alongside '' Lepisosteus''. The three surviving species are all widely separated from one another, with ''A. spatula'' being found in the south-central United States, ''A. tropicus'' in southern Mexico and Central America, and ''A. tristoechus'' in Cuba. Although generally inhabiting fresh water, they are tolerant of marine conditions. Evolution The genus first appeared during the Santonian stage of the Late Cretaceous, having diverged from ''Lepisosteus'' earlier in the Cretaceous. It quickly achieved a widespread distribution throughout the rest of the Cretaceous, being known from North America, South America and Europe. ''Atractosteus'' survived the Cretaceous-Paleogene extinction event, with one articulated fossil of the species '' A. grandei'' bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Gottlob Schneider
Johann Gottlob Theaenus Schneider (18 January 1750 – 12 January 1822) was a German classicist and naturalist. Biography Schneider was born at Collm in Saxony. In 1774, on the recommendation of Christian Gottlob Heine, he became secretary to the famous Strasbourg scholar Richard François Brunck, and in 1811, became professor of ancient languages and eloquence at Breslau (chief librarian, 1816) where he died in 1822. Works Of his numerous works the most important was his ''Kritisches griechisch-deutsches Handwörterbuch'' (1797–1798), the first independent work of the kind since Stephanus's ''Thesaurus'', and the basis of F. Passow's and all succeeding Greek lexicons (including, therefore, the contemporary standard ''A Greek-English Lexicon''). A special improvement was the introduction of words and expressions connected with natural history and science. In 1801, he corrected and expanded re-published Marcus Elieser Bloch's ''Systema Ichthyologiae iconibus cx illustratu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcus Elieser Bloch
Marcus Elieser Bloch (1723–1799) was a German physician and naturalist who is best known for his contribution to ichthyology through his multi-volume catalog of plates illustrating the fishes of the world. Brought up in a Hebrew-speaking Jewish family, he learned German and Latin and studied anatomy before settling in Berlin as a physician. He amassed a large natural history collection, particularly of fish specimens. He is generally considered one of the most important ichthyologists of the 18th century, and wrote many papers on natural history, comparative anatomy, and physiology. Life Bloch was born at Ansbach in 1723 where his father was a Torah writer and his mother owned a small shop. Educated at home in Hebrew literature he became a private tutor in Hamburg for a Jewish surgeon. Here he learned German, Latin and anatomy. He then studied medicine in Berlin and received a doctorate in 1762 from Frankfort on the Oder with a treatise on skin disorders. He then became a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atractosteus Tristoechus 03
''Atractosteus'' (from Greek ''atraktos'' (ἀτρακτὀς), 'spindle' and ''osteon'' (ὀστέον), 'bone') is a genus of gars in the family Lepisosteidae, with three extant species. It is one of two surviving gar genera alongside '' Lepisosteus''. The three surviving species are all widely separated from one another, with ''A. spatula'' being found in the south-central United States, ''A. tropicus'' in southern Mexico and Central America, and ''A. tristoechus'' in Cuba. Although generally inhabiting fresh water, they are tolerant of marine conditions. Evolution The genus first appeared during the Santonian stage of the Late Cretaceous, having diverged from ''Lepisosteus'' earlier in the Cretaceous. It quickly achieved a widespread distribution throughout the rest of the Cretaceous, being known from North America, South America and Europe. ''Atractosteus'' survived the Cretaceous-Paleogene extinction event, with one articulated fossil of the species '' A. grandei'' bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atractosteus Spatula (Alligatorhecht)
The alligator gar (''Atractosteus spatula'') is a euryhaline ray-finned fish in the clade Ginglymodi of the infraclass Holostei , being most closely related to the bowfins. It is the largest species in the gar family (Lepisosteidae), and is among the largest freshwater fishes in North America. The fossil record traces its group's existence back to the Early Cretaceous over 100 million years ago. Gars are often referred to as " primitive fishes" or " living fossils", because they have retained some morphological characteristics of their early ancestors, such as a spiral valve intestine, which is also common to the digestive system of sharks, and the ability to breathe in both air and water. Their common name was derived from their resemblance to the American alligator, particularly their broad snouts and long, sharp teeth. It is suggested that an alligator gar can grow up to in length. The body of an alligator gar is torpedo-shaped, usually brown or olive colored, fading to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shortnose Gar (8741579406)
The shortnose gar (''Lepisosteus platostomus'') is a primitive freshwater fish of the family Lepisosteidae. It is native to the United States where its range includes the Mississippi and Missouri River basins, ranging from Montana to the west and the Ohio River to the east, southwards to the Gulf Coast. It inhabits calm waters in large rivers and their backwaters, as well as oxbow lakes and large pools. It is a long, slender fish, brown or olive green above and whitish below. It typically grows to about and is armored by rows of interlocking, rhomboidal ganoid scales. The shortnose gar is an ambush predator, feeding mostly on fish, but also consuming crustaceans, insects, and other invertebrates. Breeding takes place in spring when females, often accompanied by several males, attach their eggs to clumps of submerged vegetation. The eggs, which are toxic to man, hatch after a week or so. After consuming their yolk sac, the young fish feed on insect larvae and small crustaceans, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepisosteus Osseus
The longnose gar (''Lepisosteus osseus''), also known as longnose garpike or billy gar, is a ray-finned fish in the family Lepisosteidae. The genus may have been present in North America for about 100 million years. References are made to gars being a primitive group of bony fish because they have retained some primitive features, such as a spiral valve intestine, but they are not primitive in the sense of not being fully developed. They have an olive brown to green, torpedo-shaped body armored with ganoid scales, elongated jaws that form a needle-like snout nearly three times the length of its head, and a row of numerous sharp, cone-shaped teeth on each side of the upper jaw. They typically inhabit freshwater lakes, brackish water near coastal areas, swamps, and sluggish backwaters of rivers and streams. They can breathe both air and water, which allows them to inhabit aquatic environments that are low in oxygen. Longnose gar are found along the east coasts of North and C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
