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Ocellularia Raveniana
''Ocellularia raveniana'' is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from a high-elevation tea estate in Matale ( Central Province) at an altitude of . The lichen is only known to occur at the type locality and in the Sabaragamuwa Mountain Range. The specific epithet ''raveniana'' honours botanist and environmentalist Peter H. Raven, longtime director and now President Emeritus of the Missouri Botanical Garden. ''Ocellularia raveniana'' has a cream-colored to white thallus up to in diameter, with an uneven to somewhat verrucose (warty) surface. Its ascospores are hyaline, oblong to ellipsoid in shape, contain seven to nine septa, and measure 25–35 by 8–10 μm The micrometre ( international spelling as used by the International Bureau of Weights and Mea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gothamie Weerakoon
Gothamie Weerakoon ( si, ගෝතමී වීරකෝන්) is a Sri Lankan-based botanist, lichenologist and environmentalist. Early life and education After completing her primary education at the Devi Balika Vidyalaya in Colombo, she attended the University of Colombo, completing her PhD in 2013 at the Sri Jayawardenepura University. She emerged as the most active Sri Lankan lichen researcher. Career She has conducted research on South Asian lichens, discovering over 100 new species endemic to Sri Lanka. Some of the species she has discovered include ''Heterodermia queesnberryi'' and ''Polymeridium fernandoi''. In 2015, she wrote ''Fascinating Lichens of Sri Lanka'', which provides facts about lichen species endemic to Sri Lanka. She currently works as the senior curator of Lichens and Slime Moulds at the Natural History Museum of London and also with tea brand, Dilmah. Awards and recognition She is the first South Asian woman scientist to hold the Annual Grante ... [...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] |
Taxa Named By Helge Thorsten Lumbsch
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2014
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 ( |
Lichens Of Sri Lanka
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 ( |
Ocellularia
''Ocellularia'' is a genus of lichens in the family Graphidaceae. The genus was circumscribed by Georg Friedrich Wilhelm Meyer in 1825. Species *'' Ocellularia africana'' *'' Ocellularia allosporoides'' *'' Ocellularia andamanica'' *''Ocellularia antillensis'' *'' Ocellularia aptrootiana'' *'' Ocellularia arecae'' *'' Ocellularia asiatica'' *''Ocellularia auberianoides'' *''Ocellularia auratipruinosa'' *''Ocellularia aurulenta'' *''Ocellularia bahiana'' *''Ocellularia baileyi'' *''Ocellularia balangoda'' *''Ocellularia bicuspidata'' *''Ocellularia bipindensis'' *''Ocellularia bonplandiae'' *''Ocellularia brunneospora'' *'' Ocellularia bullata'' *'' Ocellularia cameroonensis'' *'' Ocellularia cavata'' *'' Ocellularia chiriquiensis'' *'' Ocellularia clandestina'' *'' Ocellularia cloonanii'' *'' Ocellularia concolor'' *'' Ocellularia confluens'' *'' Ocellularia conglomerata'' *'' Ocellularia crocea'' *'' Ocellularia cruentata'' *'' Ocellularia decolorata'' *'' Ocellularia diacida' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Ocellularia Species
This is a list of species in the crustose lichen genus ''Ocellularia''. , Species Fungorum accepts 343 species of ''Ocellularia''. A *'' Ocellularia abbayesiana'' *'' Ocellularia africana'' *'' Ocellularia agasthiensis'' – India *'' Ocellularia alba'' *'' Ocellularia albobullata'' *'' Ocellularia albocincta'' *'' Ocellularia albocolumellata'' – New Caledonia *'' Ocellularia albogilva'' *'' Ocellularia albomaculata'' *'' Ocellularia albothallina'' – New Caledonia *'' Ocellularia albula'' *'' Ocellularia allospora'' *'' Ocellularia allosporiza'' *'' Ocellularia americana'' *'' Ocellularia andamanica'' *'' Ocellularia annuloelevata'' – India *''Ocellularia antillensis'' *'' Ocellularia apayoensis'' *'' Ocellularia aptrootiana'' – Sri Lanka *'' Ocellularia arachchigei'' *'' Ocellularia arecae'' *'' Ocellularia ascidioidea'' *''Ocellularia auberianoides'' *''Ocellularia auratipruinosa'' – Costa Rica *''Ocellularia aurulenta'' *'' Ocellularia au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Metabolite
Secondary metabolites, also called specialised metabolites, toxins, secondary products, or natural products, are organic compounds produced by any lifeform, e.g. bacteria, fungi, animals, or plants, which are not directly involved in the normal growth, development, or reproduction of the organism. Instead, they generally mediate ecological interactions, which may produce a selective advantage for the organism by increasing its survivability or fecundity. Specific secondary metabolites are often restricted to a narrow set of species within a phylogenetic group. Secondary metabolites often play an important role in plant defense against herbivory and other interspecies defenses. Humans use secondary metabolites as medicines, flavourings, pigments, and recreational drugs. The term secondary metabolite was first coined by Albrecht Kossel, a 1910 Nobel Prize laureate for medicine and physiology in 1910. 30 years later a Polish botanist Friedrich Czapek described secondary metabolit ... [...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] |
