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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] |
Magnoteuthis Microlucens
Magnoteuthis microlucens is a species of squid; the most common species of ''Mastigoteuthis'' around the main Hawaiian Islands. A specimen was caught in a filter placed in one of the deep-sea pipelines of the Natural Energy Laboratory of Hawaii Authority (NELHA) off the Hawaiian Islands in the summer of 2007. On June 12, 2007, the creature was identified as an unnamed species of squid.Associated Press 2007Rare deep-sea squid found off the Big Island ''KPUA'', July 6, 2007. Command, B. 2007Scientists all agog at 'octosquid' ''Hawaii Tribune Herald'', June 29, 2007. Yap, B.P. 2007 ''Honolulu Star Bulletin'', July 5, 2007. The ruby-red creature was about a foot long, with white suction cups on its arms. The animal died three days after it was brought to the surface. The specimen was originally dubbed "Octosquid" by NELHA operations manager Jan War, a reference to the fact that the specimen had only eight arms, like an octopus, rather than the eight arms and two tentacles of most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopod
An octopus (: octopuses or octopodes) is a soft-bodied, eight-limbed mollusc of the order Octopoda (, ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a beaked mouth at the centre point of the eight limbs. An octopus can radically deform its shape, enabling it to squeeze through small gaps. They trail their appendages behind them as they swim. The siphon is used for respiration and locomotion (by water jet propulsion). Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse invertebrates. Octopuses inhabit various ocean habitats, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature early, and are short-lived. In most species, the male uses a specially-ad ... [...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] |
Louis Joubin
Louis Marie Adolphe Olivier Édouard Joubin (27 February 1861 in Épinal – 24 April 1935 in Paris) was a professor at the Muséum national d'Histoire naturelle in Paris. He published works on nemerteans, chaetognatha, cephalopods, and other molluscs. He served as an assistant to Henri de Lacaze-Duthiers, subsequently becoming director of the laboratories at Banyuls-sur-Mer (1882) and Roscoff (1884). Later on, he became an instructor at the University of Rennes,Prosopo Sociétés savantes and in 1903 succeeded as ''chaire des mollusques, des vers et des zoophytes'' at the |
Tree Of Life Web Project
The Tree of Life Web Project (ToL) is an Internet project providing information about the diversity and phylogeny of life on Earth. This collaborative peer reviewed project began in 1995, and is written by biologists from around the world. The site has not been updated since 2011, however the pages are still accessible. The pages are linked hierarchically, in the form of the branching evolutionary tree of life, organized cladistically. Each page contains information about one particular group of organisms and is organized according to a branched tree-like form, thus showing hypothetical relationships between different groups of organisms. In 2009 the project ran into funding problems from the University of Arizona. Pages and Treehouses submitted took a considerably longer time to be approved as they were being reviewed by a small group of volunteers, and apparently, around 2011, all activities ended. History The idea of this project started in the late 1980s. David Maddison ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopoteuthis Megaptera
''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 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] |
Synonym (taxonomy)
In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The Botanical nomenclature, botanical and Zoological nomenclature, zoological codes of nomenclature treat the concept of synonymy differently. * In nomenclature, botanical nomenclature, a synonym is a Binomial nomenclature, scientific name that applies to a taxon that now goes by a different scientific name. For example, Carl Linnaeus, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different Binomial nomenclature, binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Sea
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccation, desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ink Sac
An ink sac is an anatomical feature that is found in many cephalopod mollusks used to produce the defensive cephalopod ink. With the exception of nocturnal and very deep water cephalopods, all Coleoidea (squid, octopus and cuttlefish) which dwell in light conditions have an ink sac, which can be used to expel a cloud of dark ink in order to confuse predators. The ink sac is a muscular bag which originated as an extension of the hind gut; it is a modified hypobranchial gland.Nair, J.R., D. Pillai, S.M. Joseph, P. Gomathi, P.V. Senan & P.M. Sherief (2011). ''Indian Journal of Geo-Marine Sciences'' 40(1): 13–27. It lies beneath the gut and opens into the anus, into which its contents – almost pure melanin – can be squirted; its proximity to the base of the funnel means that the ink can be distributed by ejected water as the cephalopod uses its jet propulsion. The ejected cloud of melanin is bound by mucus Mucus (, ) is a slippery aqueous secretion produced by, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralarva
Coleoidea or Dibranchiata is one of the two subclasses of cephalopod molluscs containing all the various taxa popularly thought of as "soft-bodied" or "shell-less" (i.e. octopus, squid and cuttlefish). Unlike its extant sister group Nautiloidea, whose members have a rigid outer shell for protection, the coleoids have at most an internal shell called cuttlebone or gladius that is used for buoyancy or as muscle anchorage. Some species, notably incirrate octopuses, have lost their internal shell altogether, while in some it has been replaced by a chitinous support structure. The major divisions of Coleoidea are based upon the number of arms or tentacles and their structure. The extinct and most primitive form, the Belemnoidea, presumably had ten equally-sized arms in five pairs numbered dorsal to ventral as I, II, III, IV and V. More modern species either modified or lost a pair of arms. The superorder Decapodiformes has arm pair IV modified into long tentacles with suckers gener ... [...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] |
