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Bacidia Pycnidiata
''Bacidina pycnidiata'' is a species of crustose lichen in the family Ramalinaceae. It is widely distributed in Europe and North Asia. It is characterised by its whitish or cream-coloured pycnidia with long and ostiole, ostiolar necks. Taxonomy The lichen was species description, formally described as new to science in 2006 by lichenologists Paweł Czarnota and Brian John Coppins. The type (biology), type specimen was collected by the first author west of the village of Bílá Voda, near a marble quarry (Eastern Sudetes, Golden Mountains (Sudetes), Golden Mountains, Czech Republic). There, in a mixed spruce-ash (tree), ash forest at an altitude of about , it was found growing over bryophytes on marble rocks. The botanical name, species epithet ''pycnidiata'' refers to the long-necked pycnidia that are characteristic of this species. The lichen was originally placed in the genus ''Bacidia'' based largely on the characteristics of the apothecia. The authors noted, however, that som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apothecia
An ascocarp, or ascoma (), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. Ascocarps are most commonly bowl-shaped (apothecia) but may take on a spherical or flask-like form that has a pore opening to release spores (perithecia) or no opening (cleistothecia). Classification The ascocarp is classified according to its placement (in ways not fundamental to the basic taxonomy). It is called ''epigeous'' if it grows above ground, as with the morels, while underground ascocarps, such as truffles, are termed ''hypogeous''. The structure enclosing the hymenium is divided into the types described below (apothecium, cleistothecium, etc.) and this character ''is'' important for the taxonomic classification of the fungus. Apothecia can be relatively large and fleshy, whereas the others are microscopic—about the size of flecks of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apothecia
An ascocarp, or ascoma (), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. Ascocarps are most commonly bowl-shaped (apothecia) but may take on a spherical or flask-like form that has a pore opening to release spores (perithecia) or no opening (cleistothecia). Classification The ascocarp is classified according to its placement (in ways not fundamental to the basic taxonomy). It is called ''epigeous'' if it grows above ground, as with the morels, while underground ascocarps, such as truffles, are termed ''hypogeous''. The structure enclosing the hymenium is divided into the types described below (apothecium, cleistothecium, etc.) and this character ''is'' important for the taxonomic classification of the fungus. Apothecia can be relatively large and fleshy, whereas the others are microscopic—about the size of flecks of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photobiont
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 ( |
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] |
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 were previously known as the thallophytes, a polyphyletic group of distantly related organisms. An organism or structure resembling a thallus is called thalloid, thallodal, thalliform, thalline, or thallose. A thallus usually names the entire body of a multicellular non-moving organism in which there is no organization of the tissues into organs. Even though thalli do not have organized and distinct parts (leaves, roots, and stems) as do the vascular plants, they may have analogous structures that resemble their vascular "equivalents". The analogous structures have similar function or macroscopic structure, but different microscopic structure; for example, no thallus has vascular tissue. In exceptional cases such as the Lemnoideae, where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacidina Caligans
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with ''Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus ''Bacidia''. Species *'' Bacidina adastra'' *'' Bacidina aeruginosa'' *'' Bacidina apiahica'' *'' Bacidina arnoldiana'' *'' Bacidina arvidssonii'' *'' Bacidina assulata'' *'' Bacidina brandii'' *'' Bacidina brittoniana'' *'' Bacidina californica'' *'' Bacidina caligans'' *''Bacidina canariensis'' *''Bacidina chloroticula'' *''Bacidina cinnamomea'' *'' Bacidina circumpulla'' *''Bacidina clauzadei'' *'' Bacidina contecta'' *''Bacidina convexa'' – Panama *''Bacidina crystallifera'' *''Bacidina defecta'' *''Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *'' Bacidina dissecta'' *'' Bacidina egenula'' *'' Bac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacidina Inundata
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with ''Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus '' Bacidia''. Species *'' Bacidina adastra'' *''Bacidina aeruginosa'' *'' Bacidina apiahica'' *'' Bacidina arnoldiana'' *''Bacidina arvidssonii'' *''Bacidina assulata'' *'' Bacidina brandii'' *''Bacidina brittoniana'' *''Bacidina californica'' *''Bacidina caligans'' *''Bacidina canariensis'' *''Bacidina chloroticula'' *''Bacidina cinnamomea'' *''Bacidina circumpulla'' *''Bacidina clauzadei'' *''Bacidina contecta'' *''Bacidina convexa'' – Panama *''Bacidina crystallifera'' *''Bacidina defecta'' *''Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *''Bacidina dissecta'' *''Bacidina egenula'' *'' Bacidina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical framew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sensu Lato
''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular concept, but it also appears in expressions that indicate the convention or context of the usage. Common qualifiers ''Sensu'' is the ablative case of the noun ''sensus'', here meaning "sense". It is often accompanied by an adjective (in the same case). Three such phrases are: *''sensu stricto'' – "in the strict sense", abbreviation ''s.s.'' or ''s.str.''; *''sensu lato'' – "in the broad sense", abbreviation ''s.l.''; *''sensu amplo'' – "in a relaxed, generous (or 'ample') sense", a similar meaning to ''sensu lato''. Søren Kierkegaard uses the phrase ''sensu eminenti'' to mean "in the pre-eminent r most important or significantsense". When appropriate, comparative and superlative adjectives may also be used to convey the meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Nomenclature
Nomenclature (, ) is a system of names or terms, or the rules for forming these terms in a particular field of arts or sciences. The principles of naming vary from the relatively informal conventions of everyday speech to the internationally agreed principles, rules and recommendations that govern the formation and use of the specialist terms used in scientific and any other disciplines. Naming "things" is a part of general human communication using words and language: it is an aspect of everyday taxonomy as people distinguish the objects of their experience, together with their similarities and differences, which observers identify, name and classify. The use of names, as the many different kinds of nouns embedded in different languages, connects nomenclature to theoretical linguistics, while the way humans mentally structure the world in relation to word meanings and experience relates to the philosophy of language. Onomastics, the study of proper names and their origins, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacidina
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with '' Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus ''Bacidia''. Species *'' Bacidina adastra'' *'' Bacidina aeruginosa'' *'' Bacidina apiahica'' *'' Bacidina arnoldiana'' *'' Bacidina arvidssonii'' *'' Bacidina assulata'' *'' Bacidina brandii'' *'' Bacidina brittoniana'' *'' Bacidina californica'' *'' Bacidina caligans'' *'' Bacidina canariensis'' *'' Bacidina chloroticula'' *'' Bacidina cinnamomea'' *'' Bacidina circumpulla'' *'' Bacidina clauzadei'' *'' Bacidina contecta'' *'' Bacidina convexa'' – Panama *'' Bacidina crystallifera'' *'' Bacidina defecta'' *'' Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *'' Bacidina dissecta'' *'' Bacidina egenula'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
