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Filsoniana Lhasanensis
''Filsoniana lhasanensis'' is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It is found in Tibet, where it grows on rocks at altitudes between . This species is defined by its reduced, vivid orange appearance and unique, aggregated reproductive structures. Taxonomy It was formally described as a new species in 2020 by Xue-Mei Wen, Hurnisa Shahidin, and Abdulla Abbas. The species epithet ''lhasanensis'' refers to Lhasa City, where the type specimen was collected. This was the first report of a ''Filsoniana'' species in China. Description The ''Filsoniana lhasanensis'' lichen is characterised by its crust-like structure, known as a thallus, which is (appearing as small individual patches). This thallus, which ranges from 0.1 to 0.2 mm in diameter, has a bright orange to deep orange hue. Unique to this species, the thallus is often minimal or even absent, mainly concentrating around its reproductive structures, or apothecia. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saxicolous Lichen
A saxicolous lichen is a lichen that grows on rock. The prefix "sax" from the Latin means "rock" or "stone". Characteristics Saxicolous lichens exhibit very slow growth rates. They may develop on rock substrates for long periods of time, given the absence of external disturbances. The importance of the mineral composition of the rock substrate, as well as the elemental geochemistry Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ... is also important to the distribution of saxicolous lichens, but the relationship between the substrate influence on lichens, either chemical or textural, is still obscure. Communities of saxicolous lichens are often species-rich in terms of number. References Lichenology {{lichen-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parietin
Parietin is the predominant cortical pigment of lichens in the genus '' Caloplaca'', a secondary product of the lichen ''Xanthoria parietina'', and a pigment found in the roots of Curled Dock (''Rumex crispus''). It has an orangy-yellow color and absorbs blue light. It is also known as physcion. It has also been shown to protect lichens against UV-B light, at high altitudes in Alpine regions. The UV-B light stimulates production of parietin and the parietin protects the lichens from damage. Lichens in arctic regions such as Svarlbard retain this capability though they do not encounter damaging levels of UV-B, a capability that could help protect the lichens in case of Ozone layer thinning. It has also shown anti-fungal activity against barley powdery mildew and cucumber powdery mildew, more efficiently in the latter case than treatments with fenarimol and polyoxin B. It reacts with KOH to form a deep, reddish-magenta compound. Effect on human cancer cells Also found in rhu ... [...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 ( |
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] |
Yamzho Yumco
Yamdrok Lake (also known as Yamdrok Yumtso or Yamzho Yumco; ; ) is a freshwater lake in Tibet, it is one of the three largest sacred lakes in Tibet. It is over long. The lake is surrounded by many snow-capped mountains and is fed by numerous small streams. The lake has an outlet stream at its far western end and means turquoise in English due to its color. Around to the west of the lake lies the Tibetan town of Gyantse and Lhasa is to the northeast. According to local mythology, Yamdok Yumtso lake is the transformation of a goddess. The Yamdrok Hydropower Station was completed and dedicated in 1996 near the small village of Baidi at the lake's western end. This power station is the largest in Tibet. Physical data The lake ( in area, average depth and at its deepest) is fan-shaped, spreading to the south but narrowing up to the north. The mountainous lakeshore is highly crenellated, with numerous bays and inlets. Lake Yamdrok freezes in winter. Climate Yamdrok L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shannan, Tibet
ShannanThe official spelling according to (), also romanized from Tibetan as Lhoka (; ), is a prefecture-level city in the southeastern Tibet Autonomous Region, China. Shannan includes Gonggar County within its jurisdiction with Gongkar Chö Monastery, Gonggar Dzong, and Gonggar Airport all located near Gonggar town. Located on the middle and lower reaches of the Yarlung Valley, formed by the Yarlung Tsangpo River, Lhoka region is often regarded as the birthplace of Tibetan civilization. It is bounded by the city of Lhasa to the north, Nyingchi to the east, Shigatse on the west and the international border with India and Bhutan on the south. The city measures east to west and from north to south. Its uniqueness stems from the fact that Tibet's earliest agricultural farmland, its first palace and first Buddhist monastery are all located in Lhoka. It also has the distinction of having held the first lhamo performance. Ethnic Tibetans constitute 98% of the population, the remaini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rusavskia
''Rusavskia'' is a genus of lichen-forming fungi in the family Teloschistaceae. It has 12 species. It is a member of the subfamily Xanthorioideae. The thallus of ''Rusavskia'' is characterized by its foliose lichen, foliose (leaf-like) structure with distinct and typically narrow that curve outwards. Taxonomy The genus ''Rusavskia'' was proposed by lichenologists Sergey Kondratyuk and Ingvar Kärnefelt in 2003, with ''Rusavskia elegans'' assigned as the type species. The initial circumscription (taxonomy), circumscription of the genus relied predominantly on an evaluation of morphology (biology), morphological, anatomical and chemical characteristics, with a notable absence of molecular phylogenetic analysis. For this reason, the reception of the ''Rusavskia'' by lichenologists was initially met with cautious appraisal. As several molecular studies in the subsequent years showed, the ''Rusavskia elegans''-group occupies a separate monophyletic branch in the Teloschistaceae; t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecanora
''Lecanora'' is a genus of lichen commonly called rim lichens.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, Lichens in the genus ''Squamarina'' are also called rim lichens. Members of the genus have roughly circular fruiting discs (apothecia) with rims that have photosynthetic tissue similar to that of the nonfruiting part of the lichen body (thallus). Other lichens with apothecia having margins made of thallus-like tissue are called lecanorine. ''Lecanora'' has a crustose thallus, trebouxoid photobiont, colourless ascospores and crystals in the amphitecium. It is in the family Lecanoraceae in the suborder Lecanorineae. Species : *'' Lecanora campestris'' (Schaer.) Hue 1888 *''Lecanora conizaeoides'' Nyl. ex Cromb. 1885 *'' Lecanora gangaleoides'', Nyl. 1872 *'' Lecanora grantii'', H. Magn. 1932 *''Lecanora helicopis'', (Wahlenb. ex Ach.) Ach. 1814 *'' Lecanora mellea'', W.A.Weber (1975) *''Lecanora muralis'', (Schreb.) Rabenh. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspicilia
''Aspicilia'' (sunken disk lichen) is a genus of mostly crustose areolate lichens that grow on rock. Most members have black apothecia discs that are slightly immersed in the areolas, hence the common name.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, Most of the species of this genus grow on calcareous and acidic rocks and most of the taxa prefer temperate and arctic habitats. Some members of the genus ''Aspicilia'' are pioneer species on granite and other hard rock, after which members of other lichen species may grow on them, such as members of '' Acarospora''.ACAROPSPORA, Lichen Flora of the Greater Sonoran Desert Region. Vol 3., Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001/ref> Description Members of this genus are weakly cracked to distinctly areolate, with a scattered to whole thallus, thalli. Some of the species of this genus are disc-shaped with plicate lobes at the circumference; these lobes may appear chalky white, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filsoniana Rexfilsonii
''Filsoniana rexfilsonii'' is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. Found in Australia, it was formally described as a new species in 2007. The thallus of ''Filsoniana rexfilsonii'' comprises brownish-orange each hosting one to four reproductive structures. Taxonomy The lichen was first formally described in 2007 by the lichenologists Sergey Kondratyuk and Ingvar Kärnefelt; it was initially placed in the genus ''Caloplaca''. The type specimen of ''Caloplaca rexfilsonii'' was collected by the first author in New South Wales at Kiama, specifically from Coronation Park; the specimen was found on rock outcrops situated along the ocean coast. The species epithet honours Australian lichenologist Rex Bertram Filson. The taxon was transferred to the genus ''Filsoniana'' in 2013. Description The thallus of ''Filsoniana rexfilsonii'' comprises ranging from 0.4 to 2.0 mm in width and 0.4 to 0.6 mm in thickness. Each of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filsoniana Australiensis
''Filsoniana australiensis'' is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It is found in Australia. The lichen forms patches up to 9 cm wide, with dull pink to brownish pink and a central area. It has distinctive, raised reddish-orange (fruiting bodies). Taxonomy The lichen was formally described as ''Caloplaca australiensis'' in 2007 by the lichenologists Sergey Kondratyuk, Ingvar Kärnefelt, and Rex Filson. The type specimen was collected by the second author in Western Australia at Merredin Peak in Merredin. This particular specimen was found growing on sun-exposed rocks located in an area dominated by scrub vegetation on shallow soils. The collection site is a mount consisting entirely of monolithic granite. In 2013, the taxon was transferred to ''Filsoniana'', a newly proposed genus that was segregated from ''Caloplaca''. Description ''Filsoniana australiensis'' has a thallus that typically spans wide, but also f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthocarpia Ferrarii
''Xanthocarpia'' is a genus of mostly crustose lichens in the family Teloschistaceae. It has 12 species with a largely Northern Hemisphere distribution. Taxonomy The genus was originally circumscribed in 1859 by Abramo Bartolommeo Massalongo and Giuseppe De Notaris, with ''Xanthocarpia ochracea'' as the type species. This species has tetralocular ascospores (i.e. divided into 4 chambers). Description ''Xanthocarpia'' has a thallus that is either crust-like (crustose) or like a shield or plate attached on the lower surface at a single central point (peltate). In some cases, the thallus is absent; in all cases, a cortex is absent. The lichen contains anthraquinones compounds. ''Xanthocarpia'' species often have apothecia, which are coloured yellow to orange. These apothecia are zeorine, meaning that the proper exciple (the ring-shaped layer surrounding the hymenium) is enclosed in the thalline exciple. Pycnidia can be present or absent; the conidia have a bacilliform to narrow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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