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Megalospora Occidentalis
''Megalospora occidentalis'' is a species of corticolous (bark-dwelling), crustose lichen in the family Megalosporaceae. Found in Australia, it was formally described as a new species in 1994 by lichenologist Gintaras Kantvilas. The type specimen was collected along the Vasse Highway in Beedelup National Park (Western Australia) at an altitude of ; here, in a karri-dominated wet sclerophyll forest, it was found growing on '' Trymalium floribundum''. The lichen has a thin, pale grey to glaucous-grey thallus that usually has scattered soredia. Its ascospores are oblong to ellipsoid in shape, measuring 50–90 by 20–30 μm. They are muriform, meaning they are divided into many internal cells, up to about 22 by 10. The species contains the lichen products pannarin and zeorin. The author named it ''occidentalis'' because, at the time of writing, it was the only Western Australian species known in genus ''Megalospora ''Megalospora'' is a genus of lichen-forming fungi in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gintaras Kantvilas
Gintaras Kantvilas (born 1956) is an Australian lichenologist, who earned his Ph.D in 1985 from the University of Tasmania with a thesis entitled ''Studies on Tasmanian rainforest lichens''. He has authored over 432 species names, and 167 genera in the field of mycology. Kanvilas completed his secondary education at St Virgil's College St Virgil's College is an independent Catholic primary and secondary day school for boys, located over two campuses in Austins Ferry and Hobart, Tasmania, Australia. Established in 1911 by the Congregation of Christian Brothers, the College has ... in Hobart in 1973. In 1985, he was working for the Tasmanian National Parks and Wildlife Service. In 1987 he was listing his affiliation as Department of Botany, University of Tasmania, in addition to the Tasmanian National Parks and Wildlife Service. By 2001 his affiliation was listed as the Tasmanian Herbarium, and this has continued until at least 2018. The lichen genus, '' Kantvilasia'', is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soredia
Soredia are common reproductive structures of lichens. Lichens reproduce asexually by employing simple fragmentation and production of soredia and isidia. Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria or green algae. These can be either scattered diffusely across the surface of the lichen's thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ..., or produced in localized structures called soralia. Fungal hyphae make up the basic body structure of lichen. The soredia are released through openings in the upper cortex of the lichen structure. After their release, the soredia disperse to establish the lichen in a new location. References Fungal morphology and anatomy Lichenology {{lichen-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 1994
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 ( |
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 ( |
Teloschistales
The Teloschistales are an order of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. According to one 2008 estimate, the order contains 5 families, 66 genera, and 1954 species. The predominant photobiont partners for the Teloschistales are green algae from the genera ''Trebouxia'' and '' Asterochloris''. Families *Brigantiaeaceae *Letrouitiaceae *Megalosporaceae *Teloschistaceae The Teloschistaceae are a large family of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. The family, estimated to contain over 1800 species, was extensively revised in 2013, including the creati ... References Lichen orders Lecanoromycetes orders Taxa described in 1986 Taxa named by David Leslie Hawksworth {{Teloschistales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalospora
''Megalospora'' is a genus of lichen-forming fungi in the family Megalosporaceae. Taxonomy The genus was circumscribed in 1843 by Prussian botanist Franz Meyen, with '' Megalospora sulphurata'' assigned as the type, and at that time, only species. The genus was then largely defined on the basis of the structure of the apothecia. In 2012, Gintaras Kantvilas and H. Thorsten Lumbsch synonymized the genus ''Austroblastenia'' (which contained two species) with ''Megalospora'', based on both morphology and molecular phylogeny. Description ''Megalospora'' is characterised by its large, bicellar ascospores. Other features include the crustose thallus, the lecideine apothecia, and the presence of oil droplets in the hymenium. The photobiont partner is a member of the green algal genus '' Dictyochloropsis''. ''Megalospora'' species are usually distinguished based on the type of ascospore, thallus chemistry, and the presence or absence of reproductive propagules such as isidia and sor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeorin
Zeorin is a triterpene with the molecular formula C30H52O2 which occurs in many lichens A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among hypha, filaments of multiple fungus, fungi species in a mutualism (biology), mutualistic relationship.Lichen products Pentacyclic compounds Alcohols Zeorin {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen Product
Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemical classes, including terpenoids, orcinol derivatives, chromones, xanthones, depsides, and depsidones. Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compound are exclusively found in lichens. Examples of lichen products include usnic acid (a dibenzofuran), atranorin (a depside), lichexanthone (a xanthone), salazinic acid (a depsidone), and isolichenan, an α-glucan. Many lichen products have biological activity, and research into these effects is ongoing. Lichen products accumulate on the outer walls of the fungal hyphae, and are quite stable. Crystal deposits can be visualised using scanning electron microscopy. For this reason, even very old herbarium specimens can be analysed. The amount of lichen products i ... [...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] |
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] |
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] |
