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Vitreledonella
''Vitreledonella'' is a genus of mesopelagic octopods from the family Amphitretidae which contains two species, one of which is the glass octopus. These octopods have the sucker on their arms arranged in a single series with the suckers widely separated from each other. The third left arm is hectocotylised with a spherical vesicle at the distal end and in males the other arms have suckers which are enlarged beyond the web. The eye has strong lateral compression with a near rectangular shape in lateral view and with the width equal to the diameter of the lens. There is a ventral, blunt rostrum-like extension on the eye which contains iridescent tissue above the eye. The opening to the mantle is broad, the radula is multicuspid and linear in form with the first and second lateral tooth each being unicuspid, which means that this species has a heteroglossan radula. The long and slender digestive gland is spindle-shaped and the stomach is positioned dorsally to the digestive gland. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitreledonella Richardi
''Vitreledonella richardi'', also known as the glass octopus, is an incirrate octopus. It is in the genus ''Vitreledonella'' and of the family Amphitretidae. Description ''Vitreledonella richardi'' is a transparent, gelatinous, and almost colorless meso- to bathypelagic octopod found worldwide in tropical and subtropical seas with a mantle length up to and a total length up to in adults. The upper three pairs of arms are subequal in length; in juveniles about as long as the mantle, in adults two to three times mantle length. The fourth, ventral pair is slightly shorter. Suckers are small, widely separated, and in a single series. In males, the left arm III is hectocotylized, with a spherical vesicle near the tip, but is not detachable. The large ampulla and the elongate accessory gland lie out among the internal reproductive organs, notable among mature males alongside its reproductive anatomical counterparts. Its eyes are rectangular, as seen from the side. In accordance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass Octopus
''Vitreledonella richardi'', also known as the glass octopus, is an incirrate octopus. It is in the genus ''Vitreledonella'' and of the family Amphitretidae. Description ''Vitreledonella richardi'' is a transparent, gelatinous, and almost colorless meso- to bathypelagic octopod found worldwide in tropical and subtropical seas with a mantle length up to and a total length up to in adults. The upper three pairs of arms are subequal in length; in juveniles about as long as the mantle, in adults two to three times mantle length. The fourth, ventral pair is slightly shorter. Suckers are small, widely separated, and in a single series. In males, the left arm III is hectocotylized, with a spherical vesicle near the tip, but is not detachable. The large ampulla and the elongate accessory gland lie out among the internal reproductive organs, notable among mature males alongside its reproductive anatomical counterparts. Its eyes are rectangular, as seen from the side. In accordance to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitreledonella Alberti
''Vitreledonella alberti'' is an incirrate octopus, in the genus ''Vitreledonella'' of the family Amphitretidae. It was named ''alberti'' in honor of Albert I, Prince of Monaco. Description It is a transparent octopus. It was discovered by Louis Joubin in 1924,Joubin, 1924: ''Contribution à l'étude des céphalopodes de l'Atlantique Nord (4e Série)''. Résultats des Campagnes scientifiques accomplies sur son yacht par Albert I, Prince souverain de Monaco, vol. 67, pp.1-113. six years after the discovery of its better-known congener ''Vitreledonella richardi ''Vitreledonella richardi'', also known as the glass octopus, is an incirrate octopus. It is in the genus ''Vitreledonella'' and of the family Amphitretidae. Description ''Vitreledonella richardi'' is a transparent, gelatinous, and almost co ...''. References Octopuses Molluscs described in 1924 {{Octopus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphitretidae
Amphitretidae is a family of mesopelagic octopods which contains three subfamilies, formerly classified as families in their own right. It is classified in the superfamily Octopodoidea. Species in the family Amphipetridae are characterised by having a single row of suckers on each arm (uniserial suckers), a gelatinous body and non hemispherical eyes. Taxonomy There are three subfamilies within Amphipetridae: * Subfamily Amphitretinae Hoyle, 1886 ** Genus ''Amphitretus'' Hoyle, 1885 * Subfamily Bolitaeninae Chun, 1911 ** Genus ''Bolitaena'' Steenstrup, 1859 ** Genus ''Japetella'' Hoyle, 1885 ** Genus '' Dorsopsis'' Thore, 1949 (''taxon inquirendum'') * Subfamily Vitreledonellinae Robson, 1932 ** Genus ''Vitreledonella'' 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 M .. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopus
An octopus ( : octopuses or octopodes, see below for variants) 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 center point of the eight limbs. The soft body can radically alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates. Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature earl ... [...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 Edmond Perrier as ''chaire des mollusques, des vers et des zoophytes'' at the Muséum national d'Histoire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesopelagic
The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. It is defined by light, and begins at the depth where only 1% of incident light reaches and ends where there is no light; the depths of this zone are between approximately 200 to 1,000 meters (~656 to 3,280 feet) below the ocean surface. The mesopelagic zone occupies about 60% of the planet's surface and about 20% of the ocean's volume, amounting to a large part of the total biosphere. It hosts a diverse biological community that includes bristlemouths, blobfish, bioluminescent jellyfish, giant squid, and a myriad of other unique organisms adapted to live in a low-light environment. It has long captivated the imagination of scientists, artists and writers; deep sea creatures are prominent in popular culture. Physical conditions The mesopelagic zone includes the regi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hectocotylised
A hectocotylus (plural: ''hectocotyli'') is one of the arms of male cephalopods that is specialized to store and transfer spermatophores to the female. Structurally, hectocotyli are muscular hydrostats. Depending on the species, the male may use it merely as a conduit to the female, analogously to a penis in other animals, or he may wrench it off and present it to the female. The hectocotyl arm was first described in Aristotle's biological works. Although Aristotle knew of its use in mating, he was doubtful that a tentacle could deliver sperm. The name ''hectocotylus'' was devised by Georges Cuvier, who first found one embedded in the mantle of a female argonaut. Supposing it to be a parasitic worm, in 1829 Cuvier gave it a generic name, combining the Greek word for "hundred" and Latin word for "hollow thing". Anatomy Generalized anatomy of squid and octopod hectocotyli: Variability Hectocotyli are shaped in many distinctive ways, and vary considerably between species. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mantle (mollusc)
The mantle (also known by the Latin word pallium meaning mantle, robe or cloak, adjective pallial) is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself. In many species of molluscs the epidermis of the mantle secretes calcium carbonate and conchiolin, and creates a shell. In sea slugs there is a progressive loss of the shell and the mantle becomes the dorsal surface of the animal. The words mantle and pallium both originally meant cloak or cape, see mantle (vesture). This anatomical structure in molluscs often resembles a cloak because in many groups the edges of the mantle, usually referred to as the ''mantle margin'', extend far beyond the main part of the body, forming flaps, double-layered structures which have been adapted for many different uses, including for example, the siphon. Mantle cavity The ''mantle cavity'' is a central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphitretus
''Amphitretus'' is a genus of pelagic gelatinous octopuses. It is the sole genus of subfamily Amphitretinae, one of three subfamilies in the family Amphitretidae and consists of two species. Some authorities consider '' Amphitretus thielei'' as a subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... of '' Amphitretus pelagicus'', which would make the genus monotypic. References Tree of Life website gives information about the classification of cephalopod groups Octopuses Cephalopod genera Taxa named by William Evans Hoyle {{octopus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
