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Symbion
''Symbion'' is a genus of Commensalism, commensal aquatic animals, less than 0.5 mm wide, found living attached to the mouthparts of cold-water lobsters. They have sac-like bodies, and three distinctly different forms in different parts of their two-stage life-cycle. They appear so different from other animals that they were assigned their own, new phylum Cycliophora shortly after they were discovered in 1995. This was the first new phylum of multicelled organism to be discovered since the Loricifera in 1983. Taxonomy ''Symbion pandora'' was discovered in 1995 by Reinhardt Kristensen and Peter Funch on the mouthparts of the Norway lobster (''Nephrops norvegicus''). Other, related, species have since been discovered on: * the American lobster (''Homarus americanus'', host to ''Symbion americanus'') * the European lobster (''Homarus gammarus'', host to an as yet unnamed species of ''Symbion'') The genus is so named because of its Commensalism, commensal relationship wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbion Pandora
''Symbion pandora'' is a jug-shaped microscopic aquatic animal that dwells on the mouth-parts of Norway lobsters. The animals are less than ½ mm wide, with sac-like bodies, and three distinctly different forms in different parts of their three-stage life cycle. Classification and naming They are so unlike any known animal that its discovery by Danish scientists in 1995 led to the creation of a new phylum. The phylum Cycliophora, from the Greek for 'carrying a small wheel', was named after the creature's circular mouth. Two other members of that phylum have since been discovered. ''Symbion'' refers to the animal's symbiotic relationship with its lobster host while the specific epithet ''pandora'' refers to the part of the organism's life cycle that reminded Funch and Christensen of the mythical Pandora's box. Description ''Symbion pandora'' has a bilateral, sac-like body with no coelom. There are three basic life stages: *Asexual feeding stage – At this stage, ''S. pan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbion Americanus
''Symbion americanus'' is a species of primitive animals Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a ... belonging to the family Symbiidae. It is native to Northern America. It is a microscopic marine invertebrate that lives as an ectocommensal on the mouthparts of the American lobster, Homarus americanus, specifically attaching to the setae. References Further reading * Obst, M.; Funch, P. & Kristensen, R.M. 2006: A new species of Cycliophora from the mouthparts of the American lobster, ''Homarus americanus'' (Nephropidae, Decapoda). ''Organisms diversity & evolution'', 6: 83–97. {{Taxonbar, from=Q2398708 Platyzoa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norway Lobster
''Nephrops norvegicus'', known variously as the Norway lobster, Dublin Bay prawn, ' (compare langostino) or ''scampi'', is a slim, coral-colored lobster that grows up to long, and is "the most important commercial crustacean in Europe". It is now the only extant species in the genus '' Nephrops'', after several other species were moved to the closely related genus ''Metanephrops''. It lives in the north-eastern Atlantic Ocean, and parts of the Mediterranean Sea, but is absent from the Baltic Sea and Black Sea. Adults emerge from their burrows at night to feed on worms and fish. Description ''Nephrops norvegicus'' has the typical body shape of a lobster, albeit narrower than the larger-bodied genus ''Homarus''. It is pale orange in colour, and grows to a typical length of , or exceptionally long, including the tail and claws. A carapace covers the animal's cephalothorax, while the abdomen is long and segmented, ending in a broad tail fan. The first three pairs of legs bear cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ectoprocta
Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about long, they have a special feeding structure called a lophophore, a "crown" of tentacles used for filter feeding. Most marine bryozoans live in tropical waters, but a few are found in oceanic trenches and polar waters. The bryozoans are classified as the marine bryozoans (Stenolaemata), freshwater bryozoans (Phylactolaemata), and mostly-marine bryozoans (Gymnolaemata), a few members of which prefer brackish water. 5,869living species are known. Originally all of the crown group Bryozoa were colonial, but as an adaptation to a mesopsammal (interstitial spaces in marine sand) life or to deep-sea habitats, secondarily solitary forms have since evolved. Solitary species have been described in four genera; (''Aethozooides'', ''Aethozoon'', ''Franzenella'' and ''Monobryozoon''). The latter having ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinhardt Kristensen
Reinhardt Møbjerg Kristensen (born 1948) is a Danish invertebrate biologist, noted for the discovery of three new phyla of microscopic animals: the Loricifera in 1983, the Cycliophora in 1995, and the Micrognathozoa in 2000. He is also considered one of the world's leading experts on tardigrades. His recent field of work revolves mostly around arctic biology. He is also known for documenting '' Dendrogramma'', an invertebrate genus that was later classified as Siphonophorae of the family Rhodaliidae. Loricifera Kristensen collected the first members of the Loricifera phylum in Roscoff, France, in 1970, but did not describe it until 1983.Heiner, I. 2005. Preliminary account of the loriciferan fauna of the Faroe Bank (NE Atlantic). Biofar Proceedings 2005: 213–219. Cycliophora Kristensen and Peter Funch described '' Symbion pandora'', on the mouth-parts of Norwegian lobsters, in 1995; other species were later found on other types of lobsters. Micrognathozoa Kristense ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Funch
Peter Funch (born 1965) is a Danish zoologist. A member of Aarhus University Research on the Anthropocene, he studies microscopic organisms and arthropods. He works in arctic biology, researching in Greenland. Discoveries In 1995, along with Reinhardt Møbjerg Kristensen, he discovered the microscopic aquatic animal ''Symbion pandora'', which is so unlike any other known animals that he and Kristensen authored an entire new phylum for the species, Cycliophora. Along with Kristensen, he also discovered '' Limnognathia maerski'', another aquatic microscopic animal with its new respective phylum. He has also contributed to the creation of new scanning electron microscopy and light microscopy Microscopy is the technical field of using microscopes to view subjects too small to be seen with the naked eye (objects that are not within the resolution range of the normal eye). There are three well-known branches of microscopy: optical, el ... techniques. Publications Funch has over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiosis
Symbiosis (Ancient Greek : living with, companionship < : together; and ''bíōsis'': living) is any type of a close and long-term biological interaction, between two organisms of different species. The two organisms, termed symbionts, can for example be in Mutualism (biology), mutualistic, commensalism, commensalistic, or parasitism, parasitic relationships. In 1879, Heinrich Anton de Bary defined symbiosis as "the living together of unlike organisms". The term is sometimes more exclusively used in a restricted, mutualistic sense, where both symbionts contribute to each other's subsistence. This means that they benefit each other in some way. Symbiosis can be ''obligate'' (or ''obligative''), which means that one, or both of the organisms depend on each other for survival, or ''facultative'' (optional), when they can also subsist independently. Symbiosis is also classified by physical attachment. Symbionts forming a single body live ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Lobster
''Homarus gammarus'', known as the European lobster or common lobster, is a species of lobster, clawed lobster from the eastern Atlantic Ocean, Mediterranean Sea and parts of the Black Sea. It is closely related to the American lobster, ''H. americanus''. It may grow to a length of and a mass of , and bears a conspicuous pair of claws. In life, the lobsters are blue, only becoming "lobster red" on cooking. Mating occurs in the summer, producing egg (biology), eggs which are carried by the females for up to a year before hatching into planktonic crustacean larvae, larvae. ''Homarus gammarus'' is a highly esteemed food, and is widely lobster fishing, caught using lobster trap, lobster pots, mostly around the British Isles. Description ''Homarus gammarus'' is a large crustacean, with a body length up to and weighing up to , although the lobsters caught in lobster trap, lobster pots are usually long and weigh . Like other crustaceans, lobsters have a hard exoskeleton which t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platyzoa Genera
The "Platyzoa" are a group of protostome unsegmented animals proposed by Thomas Cavalier-Smith in 1998. Cavalier-Smith included in Platyzoa the phylum Platyhelminthes (or flatworms), and a new phylum, the Acanthognatha, into which he gathered several previously described phyla of microscopic animals. Later it has been described as paraphyletic, containing the Rouphozoa and the Gnathifera. Since 2022 it is believed that Platyozoa are monophyletic and also includes Mesozoa. Phyla One scheme placed the following phyla in Platyzoa: * Rouphozoa ** Platyhelminthes ** Gastrotricha * Gnathifera ** Syndermata *** Rotifera *** Seisonida ** Acanthocephala ** Gnathostomulida ** Micrognathozoa ** Cycliophora Characteristics None of the Platyzoa groups have a respiration or circulation system because of their small size, flat body or parasitic lifestyle. The Platyhelminthes and Gastrotricha are acoelomate. The other phyla have a pseudocoel, and share characteristics such as the struc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature (journal)
''Nature'' is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, ''Nature'' features Peer review, peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international scientific publishing company Springer Nature. ''Nature'' was one of the world's most cited scientific journals by the Science Edition of the 2022 ''Journal Citation Reports'' (with an ascribed impact factor of 50.5), making it one of the world's most-read and most prestigious academic journals. , it claimed an online readership of about three million unique readers per month. Founded in the autumn of 1869, ''Nature'' was first circulated by Norman Lockyer and Alexander MacMillan (publisher), Alexander MacMillan as a public forum for scientific innovations. The mid-20th century facilitated an editorial expansion for the j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetry (biology)
Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, the face of a human being has a plane of symmetry down its centre, or a pine cone displays a clear symmetrical spiral pattern. Internal features can also show symmetry, for example the tubes in the human body (responsible for transporting gases, nutrients, and waste products) which are cylindrical and have several planes of symmetry. Biological symmetry can be thought of as a balanced distribution of duplicate body parts or shapes within the body of an organism. Importantly, unlike in mathematics, symmetry in biology is always approximate. For example, plant leaves – while considered symmetrical – rarely match up exactly when folded in half. Symmetry is one class of patterns in nature whereby there is near-repetition of the pattern element, either by reflection or rotation. Wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
