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Allographa Grandis
''Allographa grandis'' is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Cameroon, it is characterised its large ascomata and (for which it is named), and an hymenium. Taxonomy ''Allographa grandis'' was first described by German lichenologist Klaus Kalb as a new species in 2020. The specific epithet, ''grandis'', highlights the lichen's large ascomata and . The type specimen was discovered in the Begalanda Mountains near Nyangong Village in the Republic of Cameroon. Description The thallus of ''Allographa grandis'' ranges from beige to greyish white in colour. Its surface is smooth and has a with a dull to slightly shiny appearance. The of this lichen are to prominent, possessing a complete whitish . They can be elongated, straight, curved, or , with lengths of up to 15 mm and widths of 1 mm. The ascomata of ''Allographa grandis'' are of the ''illinata''-morph type, and its is apically . This lichen bears hyaline ascos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klaus Kalb
Klaus Kalb (born 1942) is a German lichenologist and an authority on tropical lichens. Biography Klaus Kalb was born in Nuremberg in 1942 and grew up in southern Bavaria. From 1960 to 1965 he studied biology, chemistry, and geography at the University of Erlangen–Nuremberg. Kalb was greatly interested in lichens and decided to pursue a doctoral degree; his thesis work was about lichen communities in the Ötztal Alps. From 1978–1981 he was a teacher at the Colégio Visconde de Porto Seguro in São Paulo, Brazil. This position afforded him the opportunity to initiate research into tropical lichens. Kalb earned his habilitation from the University of Regensburg in 1989, becoming an associate professor with that institution. In 2014, the University of Wisconsin herbarium purchased Kalb's lichen collection of 60,000 specimens for $75,000. With the acquisition of Kalb's collection, rich in tropical and European specimens, the herbarium houses about 70% of the world's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iodine
Iodine is a chemical element with the Symbol (chemistry), symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , and boils to a violet gas at . The element was discovered by the French chemist Bernard Courtois in 1811 and was named two years later by Joseph Louis Gay-Lussac, after the Ancient Greek 'violet-coloured'. Iodine occurs in many oxidation states, including iodide (I−), iodate (), and the various periodate anions. It is the least abundant of the stable halogens, being the sixty-first most abundant element. As the heaviest essential mineral nutrient, iodine is required for the synthesis of thyroid hormones. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities. The dominant producers of iodine today are Chile and Japan. Due to its high atomic number and ease of attachment to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2020
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 ( |
Allographa
''Allographa'' is a genus of script lichens in the family Graphidaceae. It has nearly 200 species. Formally circumscribed in 1824 by François Fulgis Chevallier, ''Allographa'' was formerly included in ''Graphis'', but was upgraded to generic status in 2018 by lichenologists Klaus Kalb and Robert Lücking. Species *'' Allographa acharii'' *'' Allographa adpressa'' *'' Allographa albotecta'' *'' Allographa altamirensis'' *'' Allographa amazonica'' *'' Allographa anguilliradians'' *''Allographa angustata'' *'' Allographa apertoinspersa'' *'' Allographa apoda'' *'' Allographa aptrootiana'' *''Allographa aquilonia'' *''Allographa argentata'' *''Allographa asterizans'' *''Allographa atrocelata'' *''Allographa atrocelatoides'' *''Allographa balbisii'' *''Allographa balbisina'' *''Allographa bambusicola'' – Sri Lanka *''Allographa barillasiae'' *''Allographa bettinae'' *'' Allographa bifera'' *'' Allographa brachylirellata'' *'' Allographa bukittimaensis'' *'' A ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norstictic Acid
Norstictic acid is a depsidone produced as a 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 no ...s in lichens. References Lactones Phenols Lichen products Heterocyclic compounds with 4 rings {{lichen-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Province, Cameroon
The South Region (french: Région du Sud) is located in the southwestern and south-central portion of the Republic of Cameroon. It is bordered to the east by the East Region, to the north by the Centre Region, to the northwest by the Littoral Region, to the west by the Gulf of Guinea (part of the Atlantic Ocean), and to the south by the countries of Equatorial Guinea, Gabon, and Congo. The South occupies 47,720 km2 of territory, making it the fourth largest region in the nation. The major ethnic groups are the various Beti-Pahuin peoples, such as thEwondo Fang, anBulu The South Region has a fair amount of industry, its main commerce consisting of logging, timber, mining, and offshore oil drilling. Commercial agriculture is also important in the South, the major cash crops being cocoa and rubber. Cattle rearing and fishing are significant economic components, as well. Much of the population is made up of subsistence farmers. 2008 presidential decree abolishes provinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainforest
Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainforest, but other types have been described. Estimates vary from 40% to 75% of all biotic species being indigenous to the rainforests. There may be many millions of species of plants, insects and microorganisms still undiscovered in tropical rainforests. Tropical rainforests have been called the "jewels of the Earth" and the " world's largest pharmacy", because over one quarter of natural medicines have been discovered there. Rainforests as well as endemic rainforest species are rapidly disappearing due to deforestation, the resulting habitat loss and pollution of the atmosphere. Definition Rainforest are characterized by a closed and continuous tree canopy, high humidity, the presence of moisture-dependent vegetation, a moist layer of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graphis Insulana , an international publishing company
{{disambig, genus ...
Graphis may refer to: * ''Graphis'' (lichen), a genus in the family Graphidaceae * ''Graphis'' (gastropod), a genus of sea snails in the family Cimidae *Graphis Inc. ''Graphis, Inc.'' is an international publisher of books and awards for the visual communications industry. Based in New York City, Graphis presents and promotes the best submitted work in Graphic Design, Advertising, Photography and Art/Illust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
