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Fuscopannaria Dispersa
''Fuscopannaria dispersa'' is a species of corticolous (bark-dwelling), in the family Pannariaceae. It is found in China, where it grows on the bark of several tree species at an elevation range from , close to the forest limit. It was formally described as a new species in 2000 by Norwegian lichenologist Per Magnus Jørgensen. The type specimen was collected by Joseph Rock from the eastern slopes of Likang Snow Range (Yangtze watershed, Yunnan) in 1922, and has since been documented in a few locations in eastern China. The lichen has a brown thallus made of small squamules (up to 2 mm in diameter) spread out over a distinct black prothallus. Its ascospores are ellipsoid, colourless, lack septa, and measure 15–17 by 9–10 μm. ''Fuscopannaria dispersa'' is similar to the more widespread '' F. leucosticta'' (the type species of genus ''Fuscopannaria ''Fuscopannaria'' is a genus of lichen-forming fungi in the family Pannariaceae. It has 55 species. Tax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Per Magnus Jørgensen
Per Magnus Jørgensen (born 1944) is a Norwegian botanist and lichenologist, and Professor Emeritus of systematic botany at the University of Bergen. He is known for his work on the lichen families Pannariaceae and Collemataceae. Jørgensen was awarded the Acharius Medal in 2021 for his lifetime contributions to lichenology. Biography Jørgensen was born in Stavanger, Norway, in 1944. He obtained his Candidatus realium from the University of Bergen in 1969, where Knut Fægri was his supervisor. In 1978, he earned a doctor philosophiae from University of Bergen, with a dissertation titled "The lichen family Pannariaceae in Europe". He was a student of prominent lichenologist Rolf Santesson; Gunnar Degelius was another early mentor. During his time as a student, he was recruited to work at the Botanical Garden in Bergen. A few years after receiving his doctorate, he was appointed Professor of Systematic Botany at the University of Bergen in 1982. He was known for delivering hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascospore
An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or species can occur in numbers of one (e.g. ''Monosporascus cannonballus''), two, four, or multiples of four. In a few cases, the ascospores can bud off conidia that may fill the asci (e.g. ''Tympanis'') with hundreds of conidia, or the ascospores may fragment, e.g. some ''Cordyceps'', also filling the asci with smaller cells. Ascospores are nonmotile, usually single celled, but not infrequently may be coenocytic (lacking a septum), and in some cases coenocytic in multiple planes. Mitotic divisions within the developing spores populate each resulting cell in septate ascospores with nuclei. The term ocular chamber, or oculus, refers to the epiplasm (the portion of cytoplasm not used in ascospore formation) that is surrounded by the "bourrelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2000
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen Species
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
Fuscopannaria
''Fuscopannaria'' is a genus of lichen-forming fungi in the family Pannariaceae. It has 55 species. Taxonomy The genus was circumscribed by Norwegian lichenologist Per Magnus Jørgensen in 1994, with ''Fuscopannaria leucosticta'' assigned as the type species. Jørgensen had proposed the genus a year earlier, but the genus was not validly published at that time. ''Moelleropsis'' is a genus that was published by Vilmos Kőfaragó-Gyelnik in 1940, with ''Moelleropsis nebulosa'' assigned as its type species. Using molecular phylogenetics, it was later shown that this taxon was nested within ''Fuscopannaria''. Because ''Moelleropsis'' was published earlier than ''Fuscopannaria'', the botanical rules for nomenclature indicated that ''Fuscopannaria'' be folded into synonymy with ''Moelleropsis''. However, this would have meant that several dozen species would have had to change their names, so, in order to preserve "nomenclatural stability", in 2013 Jørgensen and colleagues propo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuscopannaria Leucosticta
''Fuscopannaria'' is a genus of lichen-forming fungi in the family Pannariaceae. It has 55 species. Taxonomy The genus was circumscribed by Norwegian lichenologist Per Magnus Jørgensen in 1994, with '' Fuscopannaria leucosticta'' assigned as the type species. Jørgensen had proposed the genus a year earlier, but the genus was not validly published at that time. ''Moelleropsis'' is a genus that was published by Vilmos Kőfaragó-Gyelnik in 1940, with ''Moelleropsis nebulosa'' assigned as its type species. Using molecular phylogenetics, it was later shown that this taxon was nested within ''Fuscopannaria''. Because ''Moelleropsis'' was published earlier than ''Fuscopannaria'', the botanical rules for nomenclature indicated that ''Fuscopannaria'' be folded into synonymy with ''Moelleropsis''. However, this would have meant that several dozen species would have had to change their names, so, in order to preserve "nomenclatural stability", in 2013 Jørgensen and colleagues prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micrometre
The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (). The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, and for grading wool by the diameter of the fibres. The width of a single human hair ranges from approximately 20 to . The longest human chromosome, chromosome 1, is approximately in length. Examples Between 1 μm and 10 μm: * 1–10 μm – length of a typical bacterium * 3–8 μm – width of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septum
In biology, a septum (Latin for ''something that encloses''; plural septa) is a wall, dividing a cavity or structure into smaller ones. A cavity or structure divided in this way may be referred to as septate. Examples Human anatomy * Interatrial septum, the wall of tissue that is a sectional part of the left and right atria of the heart * Interventricular septum, the wall separating the left and right ventricles of the heart * Lingual septum, a vertical layer of fibrous tissue that separates the halves of the tongue. *Nasal septum: the cartilage wall separating the nostrils of the nose * Alveolar septum: the thin wall which separates the alveoli from each other in the lungs * Orbital septum, a palpebral ligament in the upper and lower eyelids * Septum pellucidum or septum lucidum, a thin structure separating two fluid pockets in the brain * Uterine septum, a malformation of the uterus * Vaginal septum, a lateral or transverse partition inside the vagina * Intermuscular sep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellipsoid
An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation. An ellipsoid is a quadric surface; that is, a surface that may be defined as the zero set of a polynomial of degree two in three variables. Among quadric surfaces, an ellipsoid is characterized by either of the two following properties. Every planar cross section is either an ellipse, or is empty, or is reduced to a single point (this explains the name, meaning "ellipse-like"). It is bounded, which means that it may be enclosed in a sufficiently large sphere. An ellipsoid has three pairwise perpendicular axes of symmetry which intersect at a center of symmetry, called the center of the ellipsoid. The line segments that are delimited on the axes of symmetry by the ellipsoid are called the ''principal axes'', or simply axes of the ellipsoid. If the three axes have different lengths, the figure is a triaxial ellipsoid (r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prothallus
A prothallus, or prothallium, (from Latin ''pro'' = forwards and Greek ''θαλλος'' (''thallos'') = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well. In lichens it refers to the region of the thallus that is free of algae. The prothallus develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure typically 2–5 millimeters wide, with a number of rhizoids (root-like hairs) growing underneath, and the sex organs: archegonium (female) and antheridium (male). Appearance varies quite a lot between species. Some are green and conduct photosynthesis while others are colorless and nourish themselves underground as saprotrophs. Alternation of generations Spore-bearing plants, like all plants, go through a life-cycle of alternation of generations. The fully grown sporophyte, what is commonly referred to as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corticolous Lichen
A corticolous lichen is a lichen that grows on bark.Alan Silverside's Lichen Glossary (a-f), Alan Silverside/ref> This is contrasted with lignicolous lichen, which grows on wood that has had the bark stripped from it,Alan Silverside's Lichen Glossary (g-o), Alan Silverside/ref> and saxicolous lichen, which grows on rock.Alan Silverside's Lichen Glossary (p-z), Alan Silverside/ref> Examples of corticolous lichens include the crustose lichen ''Graphis plumierae'', foliose lichen ''Melanohalea subolivacea'' and the fruticose ''Bryoria fuscescens ''Bryoria fuscescens'' is a species of lichen of the family Parmeliaceae. As of July 2021, its conservation status has not been estimated by the IUCN. In Iceland, where it grows as an epiphyte on downy birch stems and branches, it is classified ...''.Náttúrufræðistofnun Íslands celandic Institute of Natural History(1996). Válisti 1: Plöntur.' (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands. References Lichenolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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