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Dalatiidae
The Dalatiidae are the family of kitefin sharks of the order Squaliformes (the term "kitefin shark" also refers specifically to the species '' Dalatias licha''). Members of this family are small, under long, and are found worldwide. They have cigar-shaped bodies with narrow heads and rounded snouts. Several species have specialized bioluminescent organs. Though eight genera are in this family, four of them are monotypic. Genera and species * '' Dalatias'' Rafinesque, 1810 ** '' Dalatias licha'' ( Bonnaterre, 1788) (kitefin shark) ** †''Dalatias turkmenicus'' (Glikman, 1964) ** †''Dalatias orientalis'' (Malyshkina et al., 2023) * ''Euprotomicroides'' Hulley and M. J. Penrith, 1966 ** '' Euprotomicroides zantedeschia'' Hulley and M. J. Penrith, 1966 (tail-light shark) * ''Euprotomicrus'' T. N. Gill, 1865 ** '' Euprotomicrus bispinatus'' ( Quoy & Gaimard, 1824) (pygmy shark) * '' Heteroscymnoides'' Fowler, 1934 ** ''Heteroscymnoides marleyi'' Fowler, 1934 (longnose pygmy s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squaliformes
The Squaliformes are an order of sharks that includes about 126 species in seven families. Members of the order have two dorsal fins, which usually possess spines, they usually have a sharp head, no anal fin or nictitating membrane, and five to seven gill slits. In most other respects, however, they are quite variable in form and size. Most species of the squaliform order live in saltwater or brackish water. They are found worldwide, from northern to tropical waters, and from shallow coastal seas to the open ocean. All members of the family Etmoperidae and Dalatiidae and ''Zameus squamulosus'' possess photophores, luminous organs, and exhibit intrinsic bioluminescence. Bioluminescence evolved once in Squaliformes, approximately 111–153 million years ago, and helped the Squaliformes radiate and adapt to the deep sea. The common ancestor of Dalatiidae, Etmopteridae, Somniosidae, and Oxynotidae possessed a luminous organ and used bioluminescence for camouflage by co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euprotomicroides Zantedeschia
The taillight shark (''Euprotomicroides zantedeschia'') is a little-known species of shark in the family Dalatiidae and the only member of its genus.Stehmann, M.F.W., Van Oijen, M. & Kamminga, P. (2016): Re-description of the rare taillight shark ''Euprotomicroides zantedeschia'' (Squaliformes, Dalatiidae), based on third and fourth record from off Chile. ''Cybium, 40 (3): 187–197.'' It is known from only four specimens collected from deep oceanic waters in the southern Atlantic Ocean and Pacific Ocean. A small shark with a laterally compressed body and a bulbous snout, this species has unusual adaptations that indicate a specialized lifestyle: its pectoral fins are paddle-like and may be used for propulsion, unlike other sharks and it has a pouch-like gland on its abdomen that emits clouds of luminescent blue fluid. This shark is likely aplacental viviparous and a formidable predator for its size. Taxonomy and phylogeny The first specimen of the taillight shark was collecte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollisquama Parini
''Mollisquama'' is a genus of pocket sharks in the family Dalatiidae. There are two known species each only known from a single specimen; one found off the coast of Chile and the other found in the Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw .... Species There are currently two known species:Katz, Brigit. "This New Shark Species Looks Like a Tiny Sperm Whale". ''Smithsonian''. Retrieved 01 January 2021. * '' Mollisquama mississippiensis'' * '' Mollisquama parini'' References Dalatiidae Shark genera {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollisquama
''Mollisquama'' is a genus of pocket sharks in the family Dalatiidae. There are two known species each only known from a single specimen; one found off the coast of Chile and the other found in the Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw .... Species There are currently two known species:Katz, Brigit. "This New Shark Species Looks Like a Tiny Sperm Whale". ''Smithsonian''. Retrieved 01 January 2021. * '' Mollisquama mississippiensis'' * '' Mollisquama parini'' References Dalatiidae Shark genera {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isistius Plutodus
The largetooth cookiecutter shark (''Isistius plutodus'') is a rare species of squaliform shark in the family Dalatiidae, reported from depths of at scattered locations in the Atlantic and Pacific Oceans. As its common name suggests, it is similar in appearance to the cookiecutter shark (''I. brasiliensis'') but has much larger lower teeth. This species reaches a maximum known length of . The largetooth cookiecutter shark feeds by gouging out chunks of flesh from larger animals, including bony fishes, sharks, and marine mammals, and is able to take larger bites than ''I. brasiliensis''. Little is known of its life history; it is thought to be a weaker swimmer than ''I. brasiliensis'', and is presumably aplacental viviparous like the rest of its family. This shark is an infrequent bycatch of commercial trawl and longline fisheries, but is not thought to be much threatened by these activities. Taxonomy The largetooth cookiecutter shark was originally described by Jack Garrick and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euprotomicroides
The taillight shark (''Euprotomicroides zantedeschia'') is a little-known species of shark in the family Dalatiidae and the only member of its genus.Stehmann, M.F.W., Van Oijen, M. & Kamminga, P. (2016): Re-description of the rare taillight shark ''Euprotomicroides zantedeschia'' (Squaliformes, Dalatiidae), based on third and fourth record from off Chile. ''Cybium, 40 (3): 187–197.'' It is known from only four specimens collected from deep oceanic waters in the southern Atlantic Ocean and Pacific Ocean. A small shark with a laterally compressed body and a bulbous snout, this species has unusual adaptations that indicate a specialized lifestyle: its pectoral fins are paddle-like and may be used for propulsion, unlike other sharks and it has a pouch-like gland on its abdomen that emits clouds of luminescent blue fluid. This shark is likely aplacental viviparous and a formidable predator for its size. Taxonomy and phylogeny The first specimen of the taillight shark was c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euprotomicrus Bispinatus
The pygmy shark (''Euprotomicrus bispinatus''), the second-smallest of all the shark species after the dwarf lanternshark, is a squaliform shark of the family Dalatiidae, the only member of the genus ''Euprotomicrus''. Their lengths are up to about 25 cm (10 in) for females and about 22 cm (8.7 in) for males. Pygmy sharks are ovoviviparous and produce about eight young in each litter. Conservation status In June 2018 the New Zealand Department of Conservation classified the pygmy shark as "Not Threatened" with the qualifier "Secure Overseas" under the New Zealand Threat Classification System The New Zealand Threat Classification System is used by the Department of Conservation to assess conservation priorities of species in New Zealand. The system was developed because the IUCN Red List, a similar conservation status system, had s .... References {{DEFAULTSORT:Pygmy shark Dalatiidae Taxa named by Jean René Constant Quoy Taxa named by Jose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollisquama Mississippiensis
''Mollisquama mississippiensis'' or the American pocket shark is a species of pocket shark native to the Gulf of Mexico. It is the second species of pocket shark to be described. Discovery The shark was first discovered by scientists from Tulane University that were conducting a study on sperm whales in 2010. In 2013, the National Oceanic and Atmospheric Administration identified it as a pocket shark, the first to be found in its region. A previously found specimen of a different pocket shark species was caught off the coast of Chile in 1979 and was used to identify the two different species due to their differences in size, vertebrae and numerous light-producing photophores. Description The head is bulbous, resembling that of a whale. The shark is very small, at only . Near the gill A gill () is a respiration organ, respiratory organ that many aquatic ecosystem, aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isistius Brasiliensis
The cookiecutter shark (''Isistius brasiliensis''), also called the cigar shark, is a species of small squaliform shark in the family Dalatiidae. This shark lives in warm, oceanic waters worldwide, particularly near islands, and has been recorded as deep as . It migrates vertically up to every day, approaching the surface at dusk and descending with the dawn. Reaching only in length, the cookiecutter shark has a long, cylindrical body with a short, blunt snout, large eyes, two tiny spineless dorsal fins, and a large caudal fin. It is dark brown, with light-emitting photophores covering its underside except for a dark "collar" around its throat and gill slits. The name "cookiecutter shark" refers to its feeding method of gouging round plugs, as if cut out with a cookie cutter, out of larger animals. Marks made by cookiecutter sharks have been found on a wide variety of marine mammals and fishes, and on submarines, undersea cables, and human bodies. It also consumes whole smal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dalatias
''Dalatias'' is a genus of kitefin sharks that have lived since the Middle Eocene. The genus contains one extant and two extinct species: '' D. licha'' (the type species), ''D. turkmenicus'' and ''D. orientalis''. Because ''D. turkmenicus'' was described on the basis of a single tooth crown, ''D. licha'' was considered as the only valid species within the genus until Malyshkina et al. (2023) described a third species, ''D. orientalis'', from the Middle Miocene Duho Formation in Pohang, South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t .... References {{Taxonbar, from=Q17289192 Extant Eocene first appearances Shark genera Taxa named by Constantine Samuel Rafinesque Dalatiidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heteroscymnoides Marleyi
The longnose pygmy shark (''Heteroscymnoides marleyi'') is a rare species of Squaliformes, squaliform shark in the family (biology), family Dalatiidae and the monotypic, only member its genus. It is known only from a handful of specimens collected from the cold pelagic zone, oceanic waters of the Southern Hemisphere, between the surface and a depth of . Reaching in length, this diminutive shark is characterized by a slender, dark brown body with a very long, bulbous snout. In addition, it has two spineless dorsal fins of nearly equal size, with the origin of the first lying over the pectoral fin bases. The longnose pygmy shark does not appear substantially threatened by fisheries, and has been assessed as Least Concern by the International Union for Conservation of Nature (IUCN). Taxonomy The longnose pygmy shark was described by American zoologist Henry Weed Fowler in a 1934 volume of ''Proceedings of the Academy of Natural Sciences of Philadelphia'', based on a long female col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euprotomicrus
The pygmy shark (''Euprotomicrus bispinatus''), the second-smallest of all the shark species after the dwarf lanternshark, is a squaliform shark of the family Dalatiidae, the only member of the genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ... ''Euprotomicrus''. Their lengths are up to about 25 cm (10 in) for females and about 22 cm (8.7 in) for males. Pygmy sharks are ovoviviparous and produce about eight young in each litter. Conservation status In June 2018 the New Zealand Department of Conservation classified the pygmy shark as "Not Threatened" with the qualifier "Secure Overseas" under the New Zealand Threat Classification System. References {{DEFAULTSORT:Pygmy shark Dalatiidae Taxa named by Jean René Constant Quoy Taxa named by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
