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Lobothallia Semisterilis
''Lobothallia'' is a genus of lichen-forming fungi in the family Megasporaceae. Dark brown to black apothecia may be sunken into the surface of the thallus, as indicated in the common name puffed sunken-disk lichen. Originally described as a subgenus of ''Aspicilia'' in 1984, ''Lobothallia'' was elevated to full genus status in 1991 based on distinctive features including peripheral and small, thin-walled ascospores. The genus was established to clarify a group of rock-dwelling lichens that had previously been classified across several different genera. The genus is found across multiple continents including Eurasia, North America, and Australia, with the greatest diversity occurring in the semi-arid mountains of Central Asia. These lichens typically grow on exposed rock faces, from low-elevation steppes to high mountain areas above 2,600 meters, and are well-adapted to dry conditions. As of 2025, the genus includes 28 recognized species, with several new species recently di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology (from Ancient Greek μορφή (morphḗ) "form", and λόγος (lógos) "word, study, research") is the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, color, pattern, size), as well as the form and structure of internal parts like bones and organs, i.e., anatomy. This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of the overall structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Fried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foliose Lichen
A foliose lichen is a lichen with flat, leaf-like , which are generally not firmly bonded to the substrate on which it grows. It is one of the three most common growth forms of lichens. It typically has distinct upper and lower surfaces, each of which is usually covered with a cortex; some, however, lack a lower cortex. The photobiont layer lies just below the upper cortex. Where present, the lower cortex is usually dark (sometimes even black), but occasionally white. Foliose lichens are attached to their substrate either by hyphae extending from the cortex or , or by root-like structures called . The latter, which are found only in foliose lichens, come in a variety of shapes, the specifics of which can aid in species identification. Some foliose lichens attach only at a single stout peg called a , typically located near the lichen's centre. Lichens with this structure are called "umbilicate". In general, medium to large epiphytic foliose lichens are moderately sensitive to air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosette (botany)
In botany, a rosette is a circular arrangement of leaves or of structures resembling leaves. In flowering plants, rosettes usually sit near the soil, but they can also be at the top of an otherwise naked branch or trunk. Their structure is an example of a Aerial stem modification, modified stem in which the internode (botany), internode gaps between the leaves do not expand, so that all the leaves remain clustered tightly together and at a similar height. Some insects induce the development of Gall, galls that are leafy rosettes. In bryophytes and algae, a rosette results from the repeated branching of the thallus as the plant grows, resulting in a circular outline. Taxonomies Many plant family (taxonomy), families have varieties with rosette Morphology (biology), morphology; they are particularly common in Asteraceae (such as dandelions), Brassicaceae (such as cabbage), and Bromeliaceae. The fern ''Blechnum fluviatile'' or New Zealand Water Fern (''kiwikiwi'') is a rosette plan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lobothallia Radiosa (Hoffm
''Lobothallia'' is a genus of lichen-forming fungi in the family Megasporaceae. Dark brown to black apothecia may be sunken into the surface of the thallus, as indicated in the common name puffed sunken-disk lichen. Originally described as a subgenus of ''Aspicilia'' in 1984, ''Lobothallia'' was elevated to full genus status in 1991 based on distinctive features including peripheral and small, thin-walled ascospores. The genus was established to clarify a group of rock-dwelling lichens that had previously been classified across several different genera. The genus is found across multiple continents including Eurasia, North America, and Australia, with the greatest diversity occurring in the semi-arid mountains of Central Asia. These lichens typically grow on exposed rock faces, from low-elevation steppes to high mountain areas above 2,600 meters, and are well-adapted to dry conditions. As of 2025, the genus includes 28 recognized species, with several new species recently di ... [...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. It is in the family Lecanoraceae in the suborder Lecanorineae. Description ''Lecanora'' has a crustose thallus, photobiont, colourless ascospores and crystals in the amphothecium. Swiss lichenologist Rosmarie Honegger used electron microscopy in the late 1970s to investigate ascus structure in several major groups of lichen-forming fungi. She defined the ''Lecanora''-type ascus as one characterized by several distinctive features: (1) a non- amyloid, clear ascus wall that is encased in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circinaria
''Circinaria'' is a genus of lichen-forming fungi in the family Megasporaceae. It was circumscribed by Johann Heinrich Friedrich Link in 1809. Species , Species Fungorum ''Index Fungorum'' is an international project to index all formal names (Binomial nomenclature, scientific names) in the fungus Kingdom (biology), kingdom. As of 2015, the project is based at the Royal Botanic Gardens, Kew, one of three partn ... accepts 37 species of ''Circinaria''. *'' Circinaria affinis'' *'' Circinaria arida'' *'' Circinaria caesiocinerea'' *'' Circinaria calcarea'' *'' Circinaria cerebroides'' *'' Circinaria contorta'' *'' Circinaria crespiana'' *'' Circinaria cupreogrisea'' *'' Circinaria deminuta'' – Australia *'' Circinaria digitata'' *'' Circinaria elmorei'' *'' Circinaria emiliae'' *'' Circinaria esculenta'' *'' Circinaria fruticulosa'' *'' Circinaria gibbosa'' *'' Circinaria hispida'' *'' Circinaria jussuffii'' *'' Circinaria lacunosa'' *'' Circinaria laxiloba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological Type (biology), type wiktionary:en:specimen, specimen (or specimens). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the International Code of Nomenclature for algae, fungi, and plants, code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name with that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megaspora
''Megaspora'' is a genus of lichen-forming fungi in the family Megasporaceae. It contains four species of crustose lichens that typically grow on soil, bryophytes (mosses and liverworts), or plant litter on chalky . Taxonomy The genus was circumscribed by Georges Clauzade and Claude Roux in 1984 with '' M. verrucosa'' assigned as the type species. In 2012, Linda in Arcadia and Anders Nordin proposed to conserve the name ''Megaspora verrucosa'' against ''M. verrucosa'' due to taxonomic confusion stemming from historical errors in the original basionym citation. The original introduction of ''Aspicilia'' subg. ''Megaspora'' erroneously cited ''Lecanora verrucosa'' as the basionym, when it should have been ''Urceolaria verrucosa'' This misattribution led to the invalid introduction of the name ''Megaspora verrucosa'' by Hafellner & Wirth based on the wrong species. To rectify this and prevent future taxonomic issues, the proposal suggested adopting ''M. verrucos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyses
Paraphyses are erect sterile filament-like support structures occurring among the reproductive apparatuses of fungi, ferns, bryophytes and some thallophytes. The singular form of the word is paraphysis. In certain fungi, they are part of the fertile spore-bearing layer. More specifically, paraphyses are sterile filamentous hyphal end cells composing part of the hymenium of Ascomycota and Basidiomycota interspersed among either the asci or basidia respectively, and not sufficiently differentiated to be called cystidia A cystidium (: cystidia) is a relatively large cell found on the sporocarp of a basidiomycete (for example, on the surface of a mushroom gill), often between clusters of basidia. Since cystidia have highly varied and distinct shapes that are o ..., which are specialized, swollen, often protruding cells. The tips of paraphyses may contain the pigments which colour the hymenium. In ferns and mosses, they are filament-like structures that are found on sporangi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenium
The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in others some cells develop into sterile cells called cystidia ( basidiomycetes) or paraphyses ( ascomycetes). Cystidia are often important for microscopic identification. The subhymenium consists of the supportive hyphae from which the cells of the hymenium grow, beneath which is the hymenophoral trama, the hyphae that make up the mass of the hymenophore. The position of the hymenium is traditionally the first characteristic used in the classification and identification of mushrooms. Below are some examples of the diverse types which exist among the macroscopic Basidiomycota and Ascomycota. * In agarics, the hymenium is on the vertical faces of the gills. * In boletes and polypores, it is in a spongy mass of downward-pointing tubes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spot Test (lichen)
A spot test in lichenology is a spot analysis used to help identify lichens. It is performed by placing a drop of a chemical reagent on different parts of the lichen and noting the colour change (or lack thereof) associated with application of the chemical. The tests are routinely encountered in dichotomous keys for lichen species, and they take advantage of the wide array of lichen products (secondary metabolites) produced by lichens and their uniqueness among taxa. As such, spot tests reveal the presence or absence of chemicals in various parts of a lichen. They were first proposed as a method to help identify species by the Finnish lichenologist William Nylander in 1866. Three common spot tests use either 10% aqueous KOH solution (K test), saturated aqueous solution of bleaching powder or calcium hypochlorite (C test), or 5% alcoholic ''p''-phenylenediamine solution (P test). The colour changes occur due to presence of particular secondary metabolites in the lichen. In ide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
