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Scymnodalatias
''Scymnodalatias'' is a genus of squaliform sharks in the family Somniosidae The Somniosidae are a family of sharks in the order Squaliformes, commonly known as sleeper sharks. The common name "''sleeper shark''" comes from their slow swimming, low activity level, and perceived non-aggressive nature. Distribution and hab .... Species * '' Scymnodalatias albicauda'' Taniuchi & Garrick, 1986 (whitetail dogfish) * †'' Scymnodalatias cigalafulgosii'' (Adnet, 2006) * '' Scymnodalatias garricki'' Kukuev & Konovalenko, 1988 (Azores dogfish) * '' Scymnodalatias oligodon'' Kukuev & Konovalenko, 1988 (sparsetooth dogfish) * '' Scymnodalatias sherwoodi'' ( Archey, 1921) (Sherwood's dogfish) References * Shark genera Taxa named by Jack Garrick {{shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scymnodalatias Sherwoodi
The sherwood dogfish or Sherwood's dogfish (''Scymnodalatias sherwoodi'') is a very rare sleeper shark of the family Somniosidae, found only around New Zealand. The only specimen studied was about 80 cm long. The sherwood dogfish is ovoviviparous. Conservation status In June 2018 the New Zealand Department of Conservation classified the sherwood dogfish 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:Sherwood dogfish Scymnodalatias Endemic marine fish of New Zealand Fish described in 1921 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scymnodalatias Garricki
The Azores dogfish (''Scymnodalatias garricki'') is a very rare sleeper shark of the family Somniosidae. It is known only from the holotype caught north of the Azores and another caught in 2001. The Azores dogfish lives in the northeastern Atlantic Ocean at depths of 300-2000m. Like most sharks, it is ovoviviparous Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a "bridging" form of reproduction between egg-laying oviparity, oviparous and live-bearing viviparity, viviparous reproduction. Ovoviviparous animals possess embryos that develo .... References * {{DEFAULTSORT:dogfish, Azores Azores dogfish Endemic fauna of the Azores Azores dogfish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scymnodalatias Albicauda
The whitetail dogfish (''Scymnodalatias albicauda'') is a very rare sleeper shark of the family Somniosidae, found from the eastern Indian Ocean round southern Australia to New Zealand, at depths of between 150 and 500 m. Its length is up to 1.1 m. The whitetail dogfish is a rare species known only from a few specimens taken by tuna longliners and trawlers. The dorsal fins are small, the pectoral fins are angular, and there is an asymmetric caudal fin with a dark-tipped upper lobe. Coloration is grey and white, mottled with large brown or black spots, the tail mostly white with black tips. The whitetail dogfish is ovoviviparous, with at least 59 pups per litter. Conservation status In June 2018 the New Zealand Department of Conservation classified the whitetail dogfish as "Data Deficient" with the qualifier "Uncertain whether Secure Overseas" under the New Zealand Threat Classification System The New Zealand Threat Classification System is used by the Department of Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scymnodalatias Oligodon
The sparsetooth dogfish (''Scymnodalatias oligodon'') is a very rare sleeper shark of the family Somniosidae, the holotype of which was taken in the subtropical southeast Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ... at a depth of up to 200 m. Its biology is unknown. References * Scymnodalatias Fish described in 1988 {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somniosidae
The Somniosidae are a family of sharks in the order Squaliformes, commonly known as sleeper sharks. The common name "''sleeper shark''" comes from their slow swimming, low activity level, and perceived non-aggressive nature. Distribution and habitat The Somniosidae can be found in: *Arctic to subantarctic waters *Shelves in cold waters *Continental and slopes *Temperate and tropical waters Diet Beaks recovered from the stomachs of sleeper sharks suggest they feed on colossal squid.Cherel, Y. & G. Duhamel 2004. ''Deep-Sea Research Part I'' 51: 17–31. Genera and species * '' Centroscymnus'' Barbosa du Bocage & Brito Capello, 1864 ** '' Centroscymnus coelolepis'' Barbosa du Bocage & Brito Capello, 1864 (Portuguese dogfish) ** ''Centroscymnus owstonii'' Garman, 1906 (roughskin dogfish) * '' Centroselachus'' Garman, 1913 ** '' Centroselachus crepidater'' Barbosa du Bocage & Brito Capello, 1864 (longnose velvet dogfish) * '' Scymnodalatias'' Garrick, 1956 ** '' Scymnodala ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squaliform
The Squaliformes are an order (biology), 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 camouf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark
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 (taxonomy), division Selachii and are the sister group to the Batoidea, Batomorphi (Batoidea, rays and skate (fish), skates). Some sources extend the term "shark" as an informal category including Extinction, 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 shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toru Taniuchi
TORU or Toru may refer to: *TORU, spacecraft system *Tōru (given name), Japanese male given name *Toru, Pakistan, village in Mardan District of Khyber-Pakhtunkhwa, Pakistan *Tõru Tõru is a village in Saaremaa Parish, Saare County in western Estonia. Before the administrative reform in 2017, the village was in Lääne-Saare Parish Lääne-Saare Parish () was a rural Municipalities of Estonia, municipality of Estonia, ..., village in Kaarma Parish, Saare County, Estonia * Toru River, river in North Sumatra, Indonesia {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
