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Notorynchus
''Notorynchus'' is a genus of deepwater sharks in the family Hexanchidae. There is one extant species. Extant species * Broadnose sevengill shark (''Notorynchus cepedianus'') Péron, 1807 Extinct species * '' Notorynchus borealus'' Jordan & Hannibal, 1923 * ''Notorynchus kempi'' Ward, 1979 * '' Notorynchus lawleyi'' Cigala Fulgosi, 1983 * '' Notorynchus primigenius'' Agassiz, 1843 * '' Notorynchus serratissimus'' 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 recei ..., 1843 * '' Notorynchus subrecurvus'' Oppenheimer, 1907 References Shark genera Fish genera with one living species {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadnose Sevengill Shark
The broadnose sevengill shark (''Notorynchus cepedianus'') is the only extant member of the genus ''Notorynchus'', in the family Hexanchidae. It is recognizable because of its seven gill slits, while most shark species have five gill slits, with the exception of the members of the order Hexanchiformes and the sixgill sawshark. This shark has a large, thick body, with a broad head and blunt snout. The top jaw has jagged, cusped teeth and the bottom jaw has comb-shaped teeth. Its single dorsal fin is set far back along the spine towards the caudal fin, and is behind the pelvic fins. In this shark the upper caudal fin is much longer than the lower, and is slightly notched near the tip. Like many sharks, this sevengill is counter-shaded. Its dorsal surface is silver-gray to brown in order to blend with the dark water and substrate when viewed from above. In counter to this, its ventral surface is very pale, blending with the sunlit water when viewed from below. The body and fins are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notorynchus Primigenius
''Notorynchus'' is a genus of deepwater sharks in the family Hexanchidae. There is one extant species. Extant species * Broadnose sevengill shark (''Notorynchus cepedianus'') Péron, 1807 Extinct species * '' Notorynchus borealus'' Jordan & Hannibal, 1923 * ''Notorynchus kempi'' Ward, 1979 * '' Notorynchus lawleyi'' Cigala Fulgosi, 1983 * '' Notorynchus primigenius'' Agassiz, 1843 * '' Notorynchus serratissimus'' 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 recei ..., 1843 * '' Notorynchus subrecurvus'' Oppenheimer, 1907 References Shark genera Fish genera with one living species {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notorynchus Kempi
''Notorynchus'' is a genus of deepwater sharks in the family (biology), family Cow shark, Hexanchidae. There is one extant species. Extant species * Broadnose sevengill shark (''Notorynchus cepedianus'') François Péron, Péron, 1807 Extinct species * ''Notorynchus borealus'' David Starr Jordan, Jordan & Hannibal, 1923 * ''Notorynchus kempi'' Ward, 1979 * ''Notorynchus lawleyi'' Cigala Fulgosi, 1983 * ''Notorynchus primigenius'' Louis Agassiz, Agassiz, 1843 * ''Notorynchus serratissimus'' Louis Agassiz, Agassiz, 1843 * ''Notorynchus subrecurvus'' Oppenheimer, 1907 References Notorynchus, Shark genera Fish genera with one living species {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notorynchus Lawleyi
''Notorynchus'' is a genus of deepwater sharks in the family Hexanchidae. There is one extant species. Extant species * Broadnose sevengill shark (''Notorynchus cepedianus'') Péron, 1807 Extinct species * ''Notorynchus borealus'' Jordan & Hannibal, 1923 * ''Notorynchus kempi'' Ward, 1979 * '' Notorynchus lawleyi'' Cigala Fulgosi, 1983 * ''Notorynchus primigenius'' Agassiz, 1843 * ''Notorynchus serratissimus'' Agassiz, 1843 * ''Notorynchus subrecurvus ''Notorynchus'' is a genus of deepwater sharks in the family Hexanchidae. There is one extant species. Extant species * Broadnose sevengill shark (''Notorynchus cepedianus'') Péron, 1807 Extinct species * '' Notorynchus borealus'' Jordan & ...'' Oppenheimer, 1907 References Shark genera Fish genera with one living species {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cow Shark
Cow sharks are a shark family, the Hexanchidae, characterized by an additional pair or pairs of gill slits. Its species are placed within the 11 genera: '' Gladioserratus'', '' Heptranchias'', '' Hexanchus'', ''Notidanodon'', '' Notorynchus'', ''Pachyhexanchus'', ''Paraheptranchias'', ''Pseudonotidanus'', '' Welcommia'', ''Weltonia'', and '' Xampylodon''. Description Cow sharks are considered the most primitive of all the sharks, as their skeletons resemble those of ancient extinct forms, with few modern adaptations. Their excretory and digestive systems are also unspecialized, suggesting they may resemble those of primitive shark ancestors. A possible hexanchid tooth is known from the Permian of Japan, making the family a possible extant survivor of the Permian–Triassic extinction. Their most distinctive feature, however, is the presence of a sixth, and, in two genera, a seventh, gill slit, in contrast to the five found in all other sharks. The first pair are not connected ... [...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] |
