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Octopus Squid
The Octopoteuthidae are a family (biology), family of squid comprising two genus, genera. The family is characterized by tentacles which cease to grow after the paralarval stage which leads to the adult having eight arms; thus, members of this family are common name, commonly named as octopus squids. Description Octopoteuthidae is considered to be closely related to the Monotypic taxon, monotypic family Lepidoteuthidae (genus ''Lepidoteuthis''), sometimes being its Sister group, sister family. Octopus squids are Apomorphy and synapomorphy, characterized by a semi-wikt:gelatinous, gelatinous body, with very long, broad fins; the fins approach the Mantle length, length of the mantle in adults. These are oval in shape and muscular, with the two fins being fused towards the midline of the mantle. Their namesake feature is the lack of tentacles in adults; paralarvae and young juveniles possess them, but they do not develop after this stage, and so the adults only have Cephalopod limb, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taningia Danae
''Taningia danae'', the Dana octopus squid, is a species of squid in the family Octopoteuthidae, the octopus squids. It is one of the Cephalopod size, largest known squid species, and it has one of the largest photophores (light organs) known in any organism, useful in the Deep-sea community, deep-sea environments that the species inhabits. Discovery The possible (but unconfirmed) first specimen of this species was collected in 1769, when Joseph Banks, member of Captain Cook’s first voyage, spotted a massive "cuttlefish" floating in the South Pacific, off the coast of Chile. Seabirds had already damaged it, and most of the remaining carcass was Squid as food, prepared into a meal which Banks described as "one of the best soups [he] ever ate". However, he made sure to preserve an Cephalopod limb, arm, some entrails, and the buccal mass including the Cephalopod beak, beak, which would eventually enter John Hunter (surgeon), John Hunter's collection in London; the surviving buccal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopod Limb
All cephalopods possess flexible limbs extending from their heads and surrounding their 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'', 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 terms ''arms'' versus ''tentacles''. The numerous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Leviuncus
''Octopoteuthis'' is a genus of squid, one of the two referred to as octopus squid (family Octopoteuthidae), the other being ''Taningia'', its sister genus. Both ''Octopoteuthis'' and ''Taningia'' are characterized by their lack of tentacles for the majority of their life cycle, which led to their common name. Classification This genus is separated from ''Taningia'' by adults possessing spindle-shaped photophores on the tips of all 8 arms (as opposed to a globular pair on a single arm pair in ''Taningia''); the presence of additional photophores embedded in the mantle, head, and arms (the location and sizes of which vary among the species); and a smaller adult size, with mantle lengths (ML) of up to , but typically not exceeding . This genus possesses two rows of arm hooks on each arm pair, which may already be present at 2.5 mm ML. The paralarvae of this genus possess "weak", gelatinous tentacle stalks, the tentacles themselves are lost at about ML. Paired photophores may be p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Indica
''Octopoteuthis'' is a genus of squid, one of the two referred to as octopus squid (family Octopoteuthidae), the other being ''Taningia'', its sister genus. Both ''Octopoteuthis'' and ''Taningia'' are characterized by their lack of tentacles for the majority of their life cycle, which led to their common name. Classification This genus is separated from ''Taningia'' by adults possessing spindle-shaped photophores on the tips of all 8 arms (as opposed to a globular pair on a single arm pair in ''Taningia''); the presence of additional photophores embedded in the mantle, head, and arms (the location and sizes of which vary among the species); and a smaller adult size, with mantle lengths (ML) of up to , but typically not exceeding . This genus possesses two rows of arm hooks on each arm pair, which may already be present at 2.5 mm ML. The paralarvae of this genus possess "weak", gelatinous tentacle stalks, the tentacles themselves are lost at about ML. Paired photophores may be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Fenestra
''Octopoteuthis'' is a genus of squid, one of the two referred to as octopus squid (family Octopoteuthidae), the other being ''Taningia'', its sister genus. Both ''Octopoteuthis'' and ''Taningia'' are characterized by their lack of tentacles for the majority of their life cycle, which led to their common name. Classification This genus is separated from ''Taningia'' by adults possessing spindle-shaped photophores on the tips of all 8 arms (as opposed to a globular pair on a single arm pair in ''Taningia''); the presence of additional photophores embedded in the mantle, head, and arms (the location and sizes of which vary among the species); and a smaller adult size, with mantle lengths (ML) of up to , but typically not exceeding . This genus possesses two rows of arm hooks on each arm pair, which may already be present at 2.5 mm ML. The paralarvae of this genus possess "weak", gelatinous tentacle stalks, the tentacles themselves are lost at about ML. Paired photophores may be p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Deletron
''Octopoteuthis deletron'' is a species of squid in the genus '' Octopoteuthis'' of the family Octopoteuthidae. They belong to the pelagic squids of order Oegopsida. Found at depths of in the Pacific Ocean, they have been known to grow to . Biology Trophic ecology This species is described as an inactive predator, having a lower metabolism and relying on ambush, though members of this genus are higher in trophic level than glass squids and active hunters like ''Todaropsis eblanae''. ''O. deletron'' has been found to break off its arms as a defense strategy. The squid digs hooks in one of its arms into a predator and jets away, leaving the arm in the predator's skin. ''O. deletron'' are the most common species found in the stomachs of northern elephant seals sampled off the coast of California. It is an important prey item of the giant grenadier. It is also eaten by the enigmatic Perrin's beaked whale (''Mesoplodon perrini''). Reproduction The male ''O. deletron'' has a pen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Danae
''Octopoteuthis danae'' is a little known species of small squid in the genus ''Octopoteuthis'' of the family Octopoteuthidae. They belong to the pelagic squid order Oegopsida. It is found in the Atlantic Ocean. It is distinguished from the other known similar Atlantic species, ''Octopoteuthis megaptera'', by having a shorter tail which has two photophores. Its specific name honours James Dwight Dana (1813–1895) the American mineralogist and geologist who was a member of the U.S. Exploring Expedition in the Pacific of 1838–42 under Charles Wilkes Charles Wilkes (April 3, 1798 – February 8, 1877) was an American naval officer, ship's captain, and List of explorers, explorer. He led the United States Exploring Expedition (1838–1842). During the American Civil War between 1861 and 1865 .... This expedition discovered that Antarctica was a continent and named it. References Octopoteuthidae Molluscs of the Atlantic Ocean Cephalopods described in 1931 {{Squid-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spindle (textiles)
A spindle is a straight spike, usually made from wood, used for spinning, twisting fibers such as wool, flax, hemp, and cotton into yarn. It is often weighted at either the bottom, middle, or top, commonly by a disc or spherical object called a whorl; many spindles, however, are weighted simply by thickening their shape towards the bottom, e.g. Orenburg and French spindles. The spindle may also have a hook, groove, or notch at the top to guide the yarn. Spindles come in many different sizes and weights depending on the thickness of the yarn one desires to spin. History The origin of the first wooden spindle is lost to history because the materials did not survive. Whorl-weighted spindles date back at least to Neolithic times; spindle whorls have been found in archaeological digs around the world. Possible remains of spindle whorls were found in a Natufian village at Nahal Ein Gev II archeological site, Israel, from 12000 years ago. A spindle is also part of traditional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis
''Octopoteuthis'' is a genus of squid, one of the two referred to as octopus squid (family Octopoteuthidae), the other being '' Taningia'', its sister genus. Both ''Octopoteuthis'' and ''Taningia'' are characterized by their lack of tentacles for the majority of their life cycle, which led to their common name. Classification This genus is separated from ''Taningia'' by adults possessing spindle-shaped photophores on the tips of all 8 arms (as opposed to a globular pair on a single arm pair in ''Taningia''); the presence of additional photophores embedded in the mantle, head, and arms (the location and sizes of which vary among the species); and a smaller adult size, with mantle lengths (ML) of up to , but typically not exceeding . This genus possesses two rows of arm hooks on each arm pair, which may already be present at 2.5 mm ML. The paralarvae of this genus possess "weak", gelatinous tentacle stalks, the tentacles themselves are lost at about ML. Paired photophores may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Group
In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each other, further blurring any distinctions. Terms that are sometimes used synonymously but have more precise meanings are cryptic species for two or more species hidden under one species name, sibling species for two (or more) species that are each other's closest relative, and species flock for a group of closely related species that live in the same habitat. As informal taxonomic ranks, species group, species aggregate, macrospecies, and superspecies are also in use. Two or more taxa that were once considered conspecific (of the same species) may later be subdivided into infraspecific taxa (taxa within a species, such as plant variety (botany), varieties), which may be a complex ranking but it is not a species complex. In most cases, a specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photophore
A photophore is a specialized anatomical structure found in a variety of organisms that emits light through the process of boluminescence. This light may be produced endogenously by the organism itself (symbiotic) or generated through a mutualistic relationship with bioluminescent bacteria (non-symbiotic), resulting in light production on a glandular organ of animals. Light organs are most commonly found in marine animals, including many species of fish and cephalopods. The organ can be simple, or as complex as the human eye, equipped with lenses, shutters, color filters, and reflectors; unlike an eye, however, it is optimized to produce light, not absorb it. In the context of developmental biology, light organs form through precise genetic regulation and, in some cases, microbial colonization during specific stages of an organism's life cycle. They play a crucial evolutionary role in enabling species to adapt to low-light or dark environments, particularly in the deep sea. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
