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Pilophorus Acicularis
''Pilophorus acicularis'', commonly known as the nail lichen or the devil's matchstick lichen, is a species of matchstick lichen in the family Cladoniaceae. ''P. aciculare'' has both crustose (crust-like) and fruticose thallus (shrub-like) body parts. The lichen starts out as a granular crust on the rock surface, and develops fruticose stalks, or ''pseudopodetia'', up to tall and about 1 mm thick that have rounded black apothecia at the tips. The stalks are erect and curved so as to appear combed. It grows directly on silicate rocks in dense clusters. It is found on the west coast of North America up to Alaska, and in eastern Eurasia. In addition to green algae, the lichen contains cyanobacteria that help contribute to soil fertility by supplying fixed nitrogen. It was originally described in 1803, and transferred to the genus '' Pilophorus'' in 1857. History, taxonomy and phylogeny The species was first described in 1803 as ''Baeomyces acicularis'' by the Swedish bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erik Acharius
Erik Acharius (10 October 1757 – 14 August 1819) was a Swedish botanist who pioneered the Taxonomy (biology), taxonomy of lichens and is known as the "father of lichenology." Acharius was famously the last pupil of Carl Linnaeus. Life Acharius was born in 1757 to Johan Eric Acharius and Catharina Margaretha Hagtorn in Gävle.Sernander., K. “Erik Acharius - Svenskt Biografiskt Lexikon.” Fredrik Teodor Borg - Svenskt Biografiskt Lexikon, sok.riksarkivet.se/sbl/Presentation.aspx?id=5503. He received a private education until he was admitted to Gävle Gymnasium in 1770. Later he matriculated at Uppsala University in 1773 where he studied natural history and medicine under Linnaeus and was the last student to defend a dissertation before him.Thell, A., Kärnefelt, I., Seaward, M., & Westberg, M. (Eds.) (2013). In the footsteps of Erik Acharius. 20th biennial meeting of the Nordic Lichen Society. Vadstena 11–15 August 2013. Programme and Abstracts. Nordic Lichen Society. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerophoraceae
The Sphaerophoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution, especially in southern temperate regions. Sphaerophoraceae was circumscribed by mycologist Elias Magnus Fries in 1831. Genera Sphaerophoraceae contains 6 genera and 39 species. Following the genus name is the taxonomic authority, year of publication, and the number of species: *'' Austropeltum'' – 1 sp. *'' Bunodophoron'' – 25 spp. *'' Calycidium'' – 2 spp. *'' Leifidium'' – 1 sp. *'' Neophyllis'' – 2 spp. *''Sphaerophorus ''Sphaerophorus'' a genus of lichenized fungi in the order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wher ...'' – 8 spp. References Lecanorales Lichen families Lecanoromycetes families Taxa described in 1831 Taxa named by Elias Magnus Fries {{Lecanoral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18S Ribosomal RNA
18S ribosomal RNA (abbreviated 18S rRNA) is a part of the ribosomal RNA. The S in 18S represents Svedberg units. 18S rRNA is an SSU rRNA, a component of the eukaryotic ribosomal small subunit (40S). 18S rRNA is the structural RNA for the small component of eukaryotic cytoplasmic ribosomes, and thus one of the basic components of all eukaryotic cells. 18S rRNA is the eukaryotic cytosolic homologue of 16S ribosomal RNA in prokaryotes and plastids. 18S rRNA is also a homologue of 12S ribosomal RNA in mitochondria. The genes coding for 18S rRNA are referred to as 18S rRNA genes. Sequence data from these genes is widely used in molecular analysis to reconstruct the evolutionary history of organisms, especially in vertebrates, as its slow evolutionary rate makes it suitable to reconstruct ancient divergences. Uses in phylogeny The small subunit (SSU) 18S rRNA gene is one of the most frequently used genes in phylogenetic studies and an important marker for random target polymerase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principle Of Priority
270px, '' Valid name (zoology)">valid name. Priority is a fundamental principle of modern botanical nomenclature and zoological nomenclature. Essentially, it is the principle of recognising the first valid application of a name to a plant or animal. There are two aspects to this: # The first formal scientific name given to a plant or animal taxon shall be the name that is to be used, called the valid name in zoology and correct name in botany (principle of synonymy). # Once a name has been used, no subsequent publication of that name for another taxon shall be valid (zoology) or validly published (botany) (principle of homonymy). Note that nomenclature for botany and zoology is independent, and the rules of priority regarding homonyms operate within each discipline but not between them. There are formal provisions for making exceptions to the principle of priority under each of the Codes. If an archaic or obscure prior name is discovered for an established taxon, the curr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elias Magnus Fries
Elias Magnus Fries (15 August 1794 – 8 February 1878) was a Swedish mycologist and botanist. Career Fries was born at Femsjö ( Hylte Municipality), Småland, the son of the pastor there. He attended school in Växjö. He acquired an extensive knowledge of flowering plants from his father. In 1811 Fries entered Lund University where he obtained a doctorate in 1814. In the same year he was appointed an associate professorship in botany. He was elected a member of the Royal Swedish Academy of Sciences, and in 1824, became a full professor. In 1834 he became Borgström professor (Swed. ''Borgströmianska professuren'', a chair endowed by Erik Eriksson Borgström, 1708–1770) in applied economics at Uppsala University. The position was changed to "professor of botany and applied economics" in 1851. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1849. That year he was also appointed director of the Uppsala University Botani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synonym (biology)
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia lev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Description
A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a clear description of a new species of organism and explain how it differs from species that have been described previously or are related. In order for species to be validly described, they need to follow guidelines established over time. Zoological naming requires adherence to the ICZN code, plants, the ICN, viruses ICTV, and so on. The species description often contains photographs or other illustrations of type material along with a note on where they are deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million species have been identified and described, out of some 8.7 million that may actually exist. Millions more have become extinct throughout the existence of life on Earth. Naming process A name of a new species becomes valid (available in zo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribosomal DNA
Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA. These sequences regulate transcription initiation and amplification, and contain both transcribed and non-transcribed spacer segments. In the human genome there are 5 chromosomes with nucleolus organizer regions: the acrocentric chromosomes 13 ( RNR1), 14 ( RNR2), 15 ( RNR3), 21 ( RNR4) and 22 ( RNR5). The genes that are responsible for encoding the various sub-units of rRNA are located across multiple chromosomes in humans. But the genes that encode for rRNA are highly conserved across the domains, with only the copy numbers involved for the genes having varying numbers per species. In Bacteria, Archaea, and chloroplasts the rRNA is composed of different (smaller) units, the large (23S) ribosomal RNA, 16S ribosomal RNA and 5S rRNA. The 16S rRNA is widely used for phylogenetic studies. Eukaryotes The rRNA transcribed from the approximately 600 r DNA repeats forms the most abundant section of RNA foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecanorales
The Lecanorales are an order of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. The order contains 26 families, 269 genera, and 5695 species. Families * Aphanopsidaceae * Biatorellaceae * Brigantiaeaceae * Bruceomycetaceae * Carbonicolaceae * Catillariaceae * Cladoniaceae * Crocyniaceae * Dactylosporaceae * Gypsoplacaceae * Haematommataceae * Lecanoraceae * Malmideaceae * Pachyascaceae * Parmeliaceae * Pilocarpaceae * Psilolechiaceae * Psoraceae * Ramalinaceae * Ramboldiaceae * Scoliciosporaceae * Sphaerophoraceae * Stereocaulaceae * Tephromelataceae * Vezdaeaceae Genera of uncertain placement There are several genera in the Lecanorales that have not been placed with certainty into any family. These are: *''Coronoplectrum'' – 1 sp. *''Ivanpisutia'' – 1 sp. *'' Joergensenia'' – 1 sp. *'' Myochroidea'' – 4 spp. *''Neopsoromopsis ''Neopsoromopsis'' is a genus of lichen-forming fungi of uncertain famili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecanoraceae
The Lecanoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution. Taxonomy Lecanoraceae was circumscribed by German lichenologist Gustav Wilhelm Körber in 1855. Genera According to a 2017 estimate, Lecanoraceae contains 791 species distributed amongst 25 genera. *'' Adelolecia'' – 4 spp. *''Ameliella'' – 2 spp. *'' Bryodina'' – 2 spp. *'' Bryonora'' – 11 spp. *''Cladidium'' – 2 spp. *''Claurouxia'' – 1 sp. *'' Clauzadeana'' – 1 sp. *''Edrudia'' – 1 sp. *''Frutidella'' – 3 sp. *''Huea'' – 25 spp. *'' Japewiella'' – 7 spp. *''Lecanora'' – 550 spp. *'' Lecidella'' – 80 spp. *''Miriquidica'' – 25 spp. *'' Myriolecis'' – 34 spp. *''Myrionora'' – 2 spp. *'' Palicella'' – 3 spp. *'' Polyozosia'' – 42 spp. *''Protoparmeliopsis'' – 39 spp. *''Psorinia'' – 2 spp. *'' Pulvinora'' – 2 spp. *'' Punctonora'' – 1 sp. *'' Pyrrhospora'' – 8 spp. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecanora Dispersa
''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. (184 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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