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Houndsharks
The Triakidae or houndsharks are a family of ground sharks, consisting of about 40 species in nine genera. In some classifications, the family is split into two subfamilies, with the genera ''Mustelus'', '' Scylliogaleus'' and '' Triakis'' in the subfamily Triakinae, and the remainders in the subfamily Galeorhininae. Houndsharks are distinguished by possessing two large, spineless dorsal fins, an anal fin and oval eyes with nictitating eyelids. They are small to medium in size, ranging from in adult length. They are found throughout the world in warm and temperate waters, where they feed on small fish and invertebrates on the seabed and in midwater. Fossil records of this group date back to the Cenomanian. Genera Houndsharks are classified into subfamilies and genera as follows: * Galeorhininae Gill, 1862 ** '' Furgaleus'' Whitley, 1951 (whiskery shark) ** '' Galeorhinus'' Blainville, 1816 (school shark) ** '' Gogolia'' Compagno, 1973 (sailback houndshark) ** ''Hemitriaki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flapnose Houndshark
The flapnose houndshark (''Scylliogaleus quecketti'') is a houndshark of the family Triakidae, and the only member of the genus ''Scylliogaleus''. It is found in the waters off subtropical South Africa, in the western Indian Ocean between latitude In geography, latitude is a geographic coordinate system, geographic coordinate that specifies the north-south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from −90° at t ...s 27 and 33°S. This shark is estimated to be 2 to 3 feet in length. They are gray with a white underside, and they have a blunt nose with large fused nasal flaps. They have small pebble like teeth and their first and second dorsal fin are the same size. They feed primarily on crustaceans such as crabs, shrimps, lobsters and some molluscs like squid. Flapnose houndsharks are viviparous and have low fecundity having just two to four pups in a litter. After gestating for nine to ten months ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcharhiniformes
Carcharhiniformes ( from Classical Greek ' (karcharos) 'sharp/jagged' and ' (rhinos) 'nose', plus Latin ''forme'' 'shape'), commonly known as ground sharks, are the largest order of sharks, with over 270 species. They include a number of common types, such as catsharks, swellsharks, and requiem sharks. Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits. The families in the order Carcharhiniformes are expected to be revised; recent DNA studies show that some of the conventional groups are not monophyletic. The oldest members of the order appeared during the Middle-Late Jurassic, which have teeth and body forms that are morphologically similar to living catsharks. Carchariniformes first underwent major diversification during the Late Cretaceous, initially as mostly small-sized forms, before radiating into medium and large body sizes during the Cenozoic. Families Eschmeyer's Catalog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leopard Shark
The leopard shark (''Triakis semifasciata'') is a species of houndshark, in the family (biology), family Houndshark, Triakidae. It is found along the Pacific coast of North America, from the U.S. state of Oregon to Mazatlán in Mexico. Typically measuring long, this slender-bodied shark is immediately identifiable by the striking pattern of black saddle-like markings and large spots over its back, from which it derives its common name. Large schools of leopard sharks are a common sight in bays and estuary, estuaries, swimming over sandy or muddy flats or rock-strewn areas near kelp beds and reefs. They are most common near the coast, in water less than deep. Active-swimming predators, groups of leopard sharks often follow the tide onto intertidal zone, intertidal mudflats to forage for food, mainly clams, Echiura, spoon worms, crabs, shrimp, bony fish, and roe, fish eggs. Most leopard sharks tend to remain within a particular area rather than undertaking long movements elsewher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whiskery Shark
The whiskery shark (''Furgaleus macki'') is a species of houndshark in the family Triakidae, and the only member of its genus. This common shark inhabits the Australian continental shelf from Western Australia to the Bass Strait, to a depth of . It is demersal in habits and prefers rocky and vegetated habitats. Stout-bodied and almost "humpbacked" in form, the whiskery shark can be distinguished from all other members of its family by the presence of long nasal barbels. Its two moderately large dorsal fins are roughly equal in size. It is brownish gray above and lighter below, with a pattern of darker saddles and blotches in younger sharks. This species reaches in length. The diet of the whiskery shark consists almost entirely of octopuses. It is viviparous; females bear litters of four to 28 pups every other year from August to October, after a gestation period of 7–9 months. This harmless shark is used for its meat, being one of the species marketed as " flake" in Australia. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galeorhinus
''Galeorhinus'' is a genus of houndshark containing one extant species, the widespread but highly threatened school shark (''G. galeus''), and several extinct species dating back to the Late Cretaceous (Cenomanian). The majority of extinct species are known only from fossil teeth, but the Early Eocene-aged species '' G. cuvieri'' is known from extremely well-preserved full-body specimens from Monte Bolca, Italy. The oldest known species is '' G. glickmani'' from the Cenomanian of Russia. Species Extant * ''Galeorhinus galeus'' (Linnaeus, 1758) - school shark Extinct Based on the Shark-References database: * †'' Galeorhinus cuvieri'' (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 ..., 1835) (sometimes placed in '' Physogaleus'', but more recently refu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinrich Friedrich Linck
Heinrich may refer to: People * Heinrich (given name), a given name (including a list of people with the name) * Heinrich (surname), a surname (including a list of people with the name) *Hetty (given name), a given name (including a list of people with the name) Places * Heinrich (crater), a lunar crater * Heinrich-Hertz-Turm, a telecommunication tower and landmark of Hamburg, Germany Other uses * Heinrich event, a climatic event during the last ice age * Heinrich (card game), a north German card game * Heinrich (farmer), participant in the German TV show a ''Farmer Wants a Wife'' * Heinrich Greif Prize, an award of the former East German government * Heinrich Heine Prize, the name of two different awards * Heinrich Mann Prize, a literary award given by the Berlin Academy of Art * Heinrich Tessenow Medal, an architecture prize established in 1963 * Heinrich Wieland Prize The Heinrich Wieland Prize is awarded annually by the Boehringer Ingelheim Foundation for outstanding re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smooth-hound
''Mustelus'', also known as the smooth-hounds, is a genus of sharks in the family Triakidae. The name of the genus comes from the Latin word ''mustela'', meaning weasel. It should not be confused with the genus name ''Mustela'', which is used for weasels. A smooth-hound can grow to long and weigh more than . Species Currently, 27 recognized species are placed in this genus: * '' Mustelus albipinnis'' Castro-Aguirre, Antuna-Mendiola, González-Acosta & De La Cruz-Agüero, 2005 (white-margin fin houndshark) * '' Mustelus andamanensis'' White, Arunrugstichai & Naylorn, 2021 (Andaman smooth-hound) * '' Mustelus antarcticus'' Günther, 1870 (gummy shark) * '' Mustelus asterias'' Cloquet, 1821 (starry smooth-hound) * '' Mustelus californicus'' T. N. Gill, 1864 (gray smooth-hound) * '' Mustelus canis'' Mitchill, 1815 ** '' M. c. canis'' Mitchill, 1815 (dusky smooth-hound) ** '' M. c. insularis'' Heemstra, 1997 (Caribbean smooth-hound) * '' Mustelus dorsalis'' T. N. Gill, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stewart Springer
Stewart Springer (5 June 190623 August 1991) was an American ichthyologist and herpetologist. He was an expert on shark behavior, classification (taxonomy), and population distribution. More than 35 species of sharks, skates, rays, and other creatures are either classified by or named after him. Education Springer was a field naturalist, mostly self-taught. In 1964, 35 years after he dropped out of Butler University, Springer obtained a baccalaureate from George Washington University after having already achieved success in his chosen field of ichthyology. His interest in animal behavior was apparent early in his life, when at age 22, he identified and described a new species of lizard, '' Cnemidophorus velox'', the plateau striped whiptail. His interest in the whiptail was piqued, he said, by the fact that he was chaperoning a field trip with the Cottonwood Gulch Foundation in Arizona in 1928. His young team of Boy Scouts could catch jack rabbits and other lizards in the are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iago (genus)
''Iago'' is a genus of houndsharks in the family Triakidae. The name comes from the villain in William Shakespeare´s ''Othello ''The Tragedy of Othello, the Moor of Venice'', often shortened to ''Othello'' (), is a tragedy written by William Shakespeare around 1603. Set in Venice and Cyprus, the play depicts the Moorish military commander Othello as he is manipulat ...''. Also known as ''Iago omanensis'' is a small, placental viviparous shark that is found abundantly in the deep waters of the Gulf of Aqaba, Red Sea. It can be found at the depths of 150–1500 meters. Species Two recognized extant species are in this genus: * '' I. garricki'' Fourmanoir & Rivaton, 1979 (longnose houndshark) * '' I. omanensis'' Norman, 1939 (bigeye houndshark) References * Ramirez- Herrejon, JP. (2014). Long term changes in the fish fauna of Lago de Patzcuaro in Central Mexico. Retrieved fromwebofknowledge.com * Fishelson, Lev, and Avi Baranes. “Ocular Development in the Oman sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Smith (ichthyologist)
James Leonard Brierley Smith (26 September 1897 – 8 January 1968) was a South African ichthyologist, organic chemist, and university professor. He was the first to identify a taxidermied fish as a coelacanth, at the time thought to be long extinct. Early life Born in Graaff-Reinet, 26 September 1897, Smith was the elder of two sons of Joseph Smith and his wife, Emily Ann Beck. Educated at country schools at Noupoort, De Aar, and Aliwal North, he finally matriculated in 1914 from the Diocesan College, Rondebosch. He obtained a Bachelor of Arts degree in chemistry from the University of the Cape of Good Hope in 1916 and a Master of Science degree in chemistry at Stellenbosch University in 1918. Smith went to the United Kingdom, where he received his PhD at Cambridge University in 1922. After returning to South Africa, he became senior lecturer and later an associate professor of organic chemistry at Rhodes University in Grahamstown. From 1922 to 1937, he was married to He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blacktip Tope
The blacktip tope (''Hypogaleus hyugaensis''), also known as pencil shark or blacktip topeshark, is a houndshark of the family Triakidae, and the only member of the genus ''Hypogaleus''. It is found in the deep waters of the continental shelf in the Indo-West Pacific, from East Africa to Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ..., at depths between 40 and 230 m. It can grow up to a length of 1.27 m. References * blacktip tope Marine fish of East Africa Fish of the Persian Gulf Fish of Japan Fish of Taiwan Marine fish of Southern Australia blacktip tope {{shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
