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Pyroteuthis
''Pyroteuthis'' is a genus of squid in the family Pyroteuthidae. It is differentiated from the genus '' Pterygioteuthis'' by size, head shape and behaviour. Species within the genus are separated by the arrangement of tentacular photophores; the shape of the hectocotylus, and the shape of the hectocotylus hooks. With the exception of the Tropical Eastern Pacific, the genus is circumpolar in tropical and temperate oceans. The species '' P. addolux'' is the only member to occur in the North 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 definition, to Antarctica) in the south, and is bounded by the continen .... References External linksTree of Life web project: ''Pyroteuthis'' Pyroteuthidae Cephalopod genera Bioluminescent molluscs Taxa named by William Evans Hoyle {{squid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroteuthis Addolux
''Pyroteuthis addolux'' is a species of squid in the family Pyroteuthidae. It is distinguished from other members of the genus ''Pyroteuthis'' by the shape of photophores on the tentacles and the shape of the hectocotylus. The hectocotylus is located on arm IV, containing 10 proximity hooks, and six to 15 suckers at the tip. ''P. addolux'' ranges from south of the Hawaiian Islands, to the subantarctic boundary. They exhibit minor geographical variance, as southern specimens are slightly smaller than their northern counterparts. ''P. addolux'' is the only member of the genus to occur in the North Pacific, but additional members of the family Pyroteuthidae have also been found.Richard Brodeur and Orio Yamamura. 2005MICRONEKTON OF THE NORTH PACIFIC North Pacific Marine Science Organisation (PICES): pg21. The species has been observed using bioluminescence to reduce its silhouette in dim surrounding light. The type specimen was taken off southern California and described in 1972 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jewel Enope Squid
''Pyroteuthis margaritifera'', the jewel enope squid, is a species of squid in the family Pyroteuthidae. This species has three large, ellipsoidal, double photophores on the tentacles, the nearest ellipsoidal photophore to the tip is near the carpal cluster and is widely separated from the two smaller spherical photophores at the base of the tentacle, but nearer to the other two ellipsoidal photophores. Another spherical photophore is located at the base of the tentacular club. The fourth right arm is hectocotylised and has 13-19 basal hooks, each of these hooks is large and has a primary cusp with a smooth inner edge and a large, rounded secondary cusp. Betong these basal hooks there is a fleshy, elongated pad, this is a flap in other species of ''Pyroteuthis'', with three hooks opposite it and between zero and thirteen suckers at its tip. ''P. margaritifera'' has been collected off Bermuda from depths of 375–500 m in the day and between 75 and 175 m during the night. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroteuthis Serrata
''Pyroteuthis serrata'' is a species of squid in the family Pyroteuthidae. It is found north of the tropical convergence in the waters around New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ... and it does not overlap with '' Pyroteuthis margaritifera'' which has a more southerly range. References External linksTree of Life web project: ''Pyroteuthis serrata'' Pyroteuthidae Molluscs described in 1985 Molluscs of New Zealand {{squid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroteuthidae
Pyroteuthidae (the fire squids) is a family of squids. The family comprises two genera. Species are diurnally mesopelagic, migrating into surface waters during the night. The family is characterised by the tentacles, which have a permanent constriction and bend near the base; and photophores occurring on the tentacles, eyeballs, and viscera In biology, an organ is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between tissue and an organ system. Tissues are formed from same type cells to act together in a f .... Members reach mantle lengths of 23–50 mm. Paralarvae of the family are common around the Hawaiian Islands, with up to 17% of collected specimens in the area belonging to Pyroteuthidae.John R. Bower, Michael P. Seki, Richard E. Young, Keith A. Bigelow, Jed Hirota, Pierre FlamentCephalopod paralarvae assemblages in Hawaiian Islands waters 14 November 2008. Species *Genus '' Pterygiote ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Evans Hoyle
Dr William Evans Hoyle FRSE (28 January 1855 – 7 February 1926) was a noted British zoologist. A specialist in deep sea creatures he worked on classification and illustrations from the Challenger Expedition from 1882 to 1888. Life Hoyle was born in Manchester the son of William Jennings Hoyle, an engraver. He was educated at Owens College and at Exeter College and Christ Church, Oxford where he obtained a Bachelor of Arts in 1877, Master of Arts in 1882 and a Doctor of Science, he was also Member of the Royal College of Surgeons. He was the Director of the Manchester Museum from 1889 to 1909 and then was the first director of the National Museum of Wales from 1909 up to his retirement in 1926. Trained as a medical anatomist, Hoyle is most famous for his monographic studies on cephalopods from major exploring expeditions of his era including the Challenger, the Albatross, the British National Antarctic Expedition and the Scottish National Antarctic Expedition. In 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squid
True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting these criteria. Like all other cephalopods, squid have a distinct head, bilateral symmetry, and a mantle. They are mainly soft-bodied, like octopuses, but have a small internal skeleton in the form of a rod-like gladius (cephalopod), gladius or pen, made of chitin. Squid diverged from other cephalopods during the Jurassic and occupy a similar role to teleost fish as open water predators of similar size and behaviour. They play an important role in the open water food web. The two long tentacles are used to grab prey and the eight arms to hold and control it. The beak then cuts the food into suitable size chunks for swallowing. Squid are rapid swimmers, moving by Aquatic locomotion#Jet propulsion, jet propulsion, and largely locate their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterygioteuthis
''Pterygioteuthis'' is a genus of squid in the family Pyroteuthidae. Members are differentiated from the genus ''Pyroteuthis ''Pyroteuthis'' is a genus of squid in the family Pyroteuthidae. It is differentiated from the genus '' Pterygioteuthis'' by size, head shape and behaviour. Species within the genus are separated by the arrangement of tentacular photophores; the ...'' due to size and head shape. The genus is characterised by the presence of a lidded photophore over each eye. References External linksTree of Life web project: ''Pterygioteuthis'' Pyroteuthidae Bioluminescent molluscs {{squid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eduard Rüppell
Wilhelm Peter Eduard Simon Rüppell (20 November 1794 – 10 December 1884) was a German Natural history, naturalist and List of explorers, explorer. Rüppell is occasionally transliterated to "Rueppell" for the English alphabet, due to german orthography. Biography Rüppell was born in Frankfurt am Main, the son of a prosperous banker, who was a partner in 'Rüppell und Harnier’s Bank'. He was originally destined to be a merchant, but after a visit to Sinai Peninsula, Sinai in 1817, where he met Henry Salt (Egyptologist), Henry Salt and the Swiss-German traveller Johann Ludwig Burckhardt, Ludwig Burckhardt. He explored Giza and the Pyramids with Salt. In 1818, he developed an interest in natural history, and became elected member of the ''Senckenbergische Naturforschende Gesellschaf''. He attended lectures at the University of Pavia and University of Genoa in botany and zoology. Rüppell set off on his first expedition in 1821, accompanied by surgeon Michael Hey as his assistan ... [...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] |
Photophores
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] |
Hectocotylus
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] |
Tropical Eastern Pacific
The Tropical Eastern Pacific is one of the twelve marine realms that cover the coastal waters and continental shelves of the world's oceans. The Tropical Eastern Pacific extends along the Pacific Coast of the Americas, from the southern tip of the Baja California Peninsula in the north to northern Peru in the south. It is bounded on the north by the Temperate Northern Pacific realm, and on the south by the Temperate South America realm. It includes a number of oceanic islands and oceanic island groups like the Galápagos Islands, Revillagigedo Islands, Cocos Island, and Clipperton Island. Clipperton has been labelled as a meeting point between the Oceanian realm and the Tropical Eastern Pacific realm. The Galápagos Islands are also believed to have much higher percentages of Indo-West Pacific species in their marine faunas when compared to the continental American coasts. A 2018 study revealed interconnectivity of species between the Line Islands, Hawaii and Clipperton, as well a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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