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Mastigoteuthis Psychrophila
''Mastigoteuthis psychrophila'' is a species of whip-lash squid. It was first described by Kir Nazimovich Nesis in 1977, based on four individuals found in Antarctic waters. The largest was 143 mm long. The squid's tentacles are 15 mm in diameter, with 0.15 mm diameter club suckers. Integumental photophores are present upon the head, arms and fin A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foils that produce lift or thrust, or provide the ability to steer or stabilize motion while traveling in water, air, or other fluids. Fin ...s. Although uncertain, it is believed to have more than two series of photophores on the arms, differing from other species in the '' M. agassizii'' group. However, this species, like the rest of the family, is badly in need of revision. References *Nesis, K.N. 1977. ''Mastigoteuthis psychrophila'' sp. n. (Cephalopoda, Mastigoteuthidae) from the Southern Ocean. ''Zoologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kir Nazimovich Nesis
Kir Nazimovich Nesis (9 January 1934 – 8 January 2003) was a Russian marine biologist and malacologist, specialising in cephalopods. Early life and education Nesis was born in Moscow on 9 January 1934 to an intellectual family, his father was an architect and his mother was an economic geographer. His father was arrested by the Soviet state in 1938 and executed. This would cause some difficulty for Nesis as he was the son of a person who had been executed as an enemy of the state. He initially wanted to study astronomy and he won an All-Union Competition in astronomy for schoolchildren but this career was not open to the son of an "enemy of the nation". He decided instead to become a marine biologist and in 1951 he enrolled in a course at the Moscow Technical Institute for Fisheries and Fishery Management in the Department of Hydrobiology, as this was not among the top ranked Soviet institutions his father's status did not bar him from entry. Career After graduation Nesis was se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whip-lash Squid
The Mastigoteuthidae, also known as whip-lash squid, are a family of small deep-sea squid. Approximately 20 known species in six genera are represented, with members found in both the mesopelagic and bathypelagic zone of most oceans. Originally described by Verill in 1881, it was later lowered by Chun (1920) to a subfamily (Mastigoteuthinae) of the Chiroteuthidae. However, Roper et al. (1969) raised it back to the family level, and this has not been changed since. The taxonomy of this family is extremely unstable, and there have been at times one genus (Young, Lindgren, & Vecchione, 2008), two genera and four subgenera(Salcedo-Vargas & Okutani, 1994), two genera and several 'groups' (Salcedo-Vargas, 1997), five genera (Braid, McBride, & Bolstad, 2014) and one species with an uncertain placement, or six genera (Young, Vecchione, & Braid, 2014). Description Mastigoteuthids range in size from quite small species in the genus '' Mastigoteuthis'', to relatively gigantic sizes in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic
The Antarctic ( or , American English also or ; commonly ) is a polar region around Earth's South Pole, opposite the Arctic region around the North Pole. The Antarctic comprises the continent of Antarctica, the Kerguelen Plateau and other island territories located on the Antarctic Plate or south of the Antarctic Convergence. The Antarctic region includes the ice shelves, waters, and all the island territories in the Southern Ocean situated south of the Antarctic Convergence, a zone approximately wide varying in latitude seasonally. The region covers some 20 percent of the Southern Hemisphere, of which 5.5 percent (14 million km2) is the surface area of the Antarctica continent itself. All of the land and ice shelves south of 60°S latitude are administered under the Antarctic Treaty System. Biogeographically, the Antarctic realm is one of eight biogeographic realms of Earth's land surface. Geography As defined by the Antarctic Treaty System, the Antarctic r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tentacle
In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work mainly like muscular hydrostats. Most forms of tentacles are used for grasping and feeding. Many are sensory organs, variously receptive to touch, vision, or to the smell or taste of particular foods or threats. Examples of such tentacles are the eyestalks of various kinds of snails. Some kinds of tentacles have both sensory and manipulatory functions. A tentacle is similar to a cirrus, but a cirrus is an organ that usually lacks the tentacle's strength, size, flexibility, or sensitivity. A nautilus has cirri, but a squid has tentacles. Invertebrates Molluscs Many molluscs have tentacles of one form or another. The most familiar are those of the pulmonate land snails, which usually have two sets of tentacles on the head: when extended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photophore
A photophore is a glandular organ that appears as luminous spots on various marine animals, including fish and cephalopods. The organ can be simple, or as complex as the human eye; equipped with lenses, shutters, color filters and reflectors, however unlike an eye it is optimized to produce light, not absorb it. The bioluminescence can variously be produced from compounds during the digestion of prey, from specialized mitochondrial cells in the organism called photocytes ("light producing" cells), or, similarly, associated with symbiotic bacteria in the organism that are cultured. The character of photophores is important in the identification of deep sea fishes. Photophores on fish are used for attracting food or for camouflage from predators by counter-illumination. Photophores are found on some cephalopods including the firefly squid, which can create impressive light displays, as well as numerous other deep sea organisms such as the pocket shark Mollisquama mississippien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopod Arm
All cephalopods possess flexible limbs extending from their heads and surrounding their cephalopod beak, beaks. These appendages, which function as muscular hydrostats, have been variously termed arms, legs or tentacles. Description In the scientific literature, a cephalopod ''arm'' is often treated as distinct from a ''Tentacle#Tentacles in invertebrates, tentacle'', though the terms are sometimes used interchangeably, often with the latter acting as an umbrella term for cephalopod limbs. Generally, arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends.Young, R.E., M. Vecchione & K.M. Mangold 1999Cephalopoda Glossary Tree of Life web project. Barring a few exceptions, octopuses have eight arms and no tentacles, while squid and cuttlefish have eight arms (or two "legs" and six "arms") and two tentacles.Norman, M. 2000. ''Cephalopods: A World Guide''. ConchBooks, Hackenheim. p. 15. "There is some confusion around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastigoteuthis Agassizii
''Mastigoteuthis agassizii'' is a species of whip-lash squid. It is the type species of the genus. Image:Mastigoteuthis agassizii.jpg, Oral view of a sucker from the middle of a lateral arm Image:Mastigoteuthis agassizii2.jpg, Aboral view of a portion of the tentacular club Image:Mastigoteuthis agassizii3.jpg, Various views of club suckers Image:Mastigoteuthis agassizii4.jpg, Head and funnel with Funnel–mantle locking apparatus, funnel locking apparatus References *Verrill, A.E. 1881. Report on the Cephalopods, and on Some Additional Species Dredged by the U.S. Fish Commission Steamer "Fish Hawk", During the Season of 1880. ''Bulletin of the Museum of Comparative Zoology'' 8(5): 99-116. *Verrill, A.E. 1881. The Cephalopods of the North-eastern Coast of America. Part II. The Smaller Cephalopods, Including the "Squids" and the Octopi, with Other Allied Forms. ''Transactions of the Connecticut Academy of Sciences'' 5: 259-446. External links Tree of Life web project: ''Mastig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastigoteuthis
''Mastigoteuthis'' is a genus of whip-lash squid containing at least seven valid species. Some teuthologists consider ''Idioteuthis'' synonymous with this taxon. The genus contains bioluminescent species. Species *Genus ''Mastigoteuthis'' **'' Mastigoteuthis agassizii'' Verrill, 1881 **'' Mastigoteuthis dentata'' Hoyle, 1904 **''Mastigoteuthis flammea'' Chun, 1908 **'' Mastigoteuthis glaukopis'' Chun, 1908 **'' Mastigoteuthis grimaldii'' ( Joubin, 1895) **'' Mastigoteuthis psychrophila'' Nesis, 1977 **'' Mastigoteuthis schmidti'' Degner, 1925 **'' Mastigoteuthis hastula'' * ( Berry, 1920) **''Mastigoteuthis inermis'' * Rancurel, 1972 **'' Mastigoteuthis iselini'' * MacDonald & Clench, 1934 **'' Mastigoteuthis okutanii'' * Salcedo-Vargas, 1997 **'' Mastigoteuthis tyroi'' * Salcedo-Vargas, 1997 '' Magnapinna talismani'' was previously placed in this genus, but is now considered a species of bigfin squid. The taxa listed above with an asterisk (*) are ''taxon inquirendum In bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna Of Antarctica
Fauna is all of the animal life present in a particular region or time. The corresponding term for plants is ''flora'', and for fungi, it is ''funga''. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoologists and paleontologists use ''fauna'' to refer to a typical collection of animals found in a specific time or place, e.g. the "Sonoran Desert fauna" or the "Burgess Shale fauna". Paleontologists sometimes refer to a sequence of faunal stages, which is a series of rocks all containing similar fossils. The study of animals of a particular region is called faunistics. Etymology ''Fauna'' comes from the name Fauna, a Roman goddess of earth and fertility, the Roman god Faunus, and the related forest spirits called Fauns. All three words are cognates of the name of the Greek god Pan, and ''panis'' is the Greek equivalent of fauna. ''Fauna'' is also the word for a book that catalogues the animals in such a manner. The term was first used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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