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Roccellinastrum Spongoideum
''Roccellinastrum'' is a genus of lichen-forming fungi in the family Pilocarpaceae. It has seven species. Taxonomy The genus was circumscription (taxonomy), circumscribed in 1968 by German lichenologist Gerhard Follman, with ''Roccellinastrum spongoideum'' assigned as the type species. This byssoid lichen (appearing wispy, like teased wool) was found growing on cactus spines in the Lomas, fog oases of western Chile. Follman classified the genus in the family Chrysothricaceae, as he emphasized the taxonomy (biology), taxonomic importance of the byssoid thallus, and the similarity of the apothecium and ascus structure to those in that family. In 1983, Aino Henssen and colleagues Emendation (zoology), emended the genus and placed it in the family Lecideaceae. ''Roccellinastrum'' is now classified in the family Pilocarpaceae. Description Species in genus ''Roccellinastrum'' are characterized by apothecia of diverse shape that lack a proper margin, and a ontology, developmental morpho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrysothricaceae
Chrysotrichaceae is a family of lichenized fungi in the order Arthoniales. Member of this family have a widespread distribution, but are especially prevalent in tropical areas. "Chrysothrichaceae" and "Chrysothricaceae" are alternative spellings that have been used in some older publications; the latter was used by Alexander Zahlbruckner in the protologue publication. Both of these spellings are considered incorrect, and the current spelling has been formalised following a proposal for conservation of Chrysotrichaceae against Pulverariaceae (an earlier synonym). Genera * '' Byssocaulon'' – 1 sp. * ''Chrysothrix ''Chrysothrix'' is a genus of lichen-forming fungi in the family Chrysotrichaceae. They are commonly called gold dust lichens or sulfur dust lichens,Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, because they ...'' – ca. 18 spp. * '' Galbinothrix'' – 1 sp. * '' Melarthonis'' – 1 sp. References Arthoniomycetes Lich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypha
A hypha (; ) is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycelium. Structure A hypha consists of one or more cells surrounded by a tubular cell wall. In most fungi, hyphae are divided into cells by internal cross-walls called "septa" (singular septum). Septa are usually perforated by pores large enough for ribosomes, mitochondria, and sometimes nuclei to flow between cells. The major structural polymer in fungal cell walls is typically chitin, in contrast to plants and oomycetes that have cellulosic cell walls. Some fungi have aseptate hyphae, meaning their hyphae are not partitioned by septa. Hyphae have an average diameter of 4–6 μm. Growth Hyphae grow at their tips. During tip growth, cell walls are extended by the external assembly and polymerization of cell wall components, and the internal production of new cell membrane. ... [...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] |
Amyloid (mycology)
In mycology a tissue (biology), tissue or feature is said to be amyloid if it has a positive amyloid reaction when subjected to a crude chemical test using iodine as an ingredient of either Melzer's reagent or Lugol's solution, producing a blue to blue-black staining. The term "amyloid" is derived from the Latin ''amyloideus'' ("starch-like"). It refers to the fact that starch gives a similar reaction, also called an amyloid reaction. The test can be on microscopic features, such as spore walls or hyphae, hyphal walls, or the apical apparatus or entire ascus wall of an ascus, or be a macroscopic reaction on tissue where a drop of the reagent is applied. Negative reactions, called inamyloid or nonamyloid, are for structures that remain pale yellow-brown or clear. A reaction producing a deep reddish to reddish-brown staining is either termed a dextrinoid reaction (pseudoamyloid is a synonym) or a hemiamyloid reaction. Melzer's reagent reactions Hemiamyloidity Hemiamyloidity in mycol ... [...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 Suborder Lecanorineae * Biatorellaceae M. Choisy ex Hafellner & Casares-Porcel, 1992 * Brigantiaeaceae Hafellner & Bellem., 1982 * Bruceomycetaceae Rikkinen & A.R.Schmidt in Rikkinen et al., * Byssolomataceae Zahlbr. 1926 * Carbonicolaceae Bendiksby & Timdal (2013) * Catillariaceae Hafellner, 1984 * Cetradoniaceae J.C. Wei & Ahti 2002 * Cladoniaceae Zenker, J.C. 1827–1829 * Dactylosporaceae Bellem. & Hafellner, 1982 * Gypsoplacaceae Timdal, E. 1990 * Haematommataceae Hafellner, 1984 * Lecanoraceae Fée, A.L.A. 1824 * Malmideaceae Kalb, K., Rivas Plata, E., Lücking, R. & Lumbsch, H.T. 2011 * Pachyascaceae Poelt ex P.M.Kirk, P.F.Cannon & J.C.David, 2001 * Parmeliaceae The Parmeliaceae is a large and diverse family of Lecanoromycetes. With over 2700 species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontology
Ontology is the philosophical study of existence, being. It is traditionally understood as the subdiscipline of metaphysics focused on the most general features of reality. As one of the most fundamental concepts, being encompasses all of reality and every entity within it. To articulate the basic structure of being, ontology examines the commonalities among all things and investigates their classification into basic types, such as the Theory of categories, categories of particulars and Universal (metaphysics), universals. Particulars are unique, non-repeatable entities, such as the person Socrates, whereas universals are general, repeatable entities, like the color ''green''. Another distinction exists between Abstract and concrete, concrete objects existing in space and time, such as a tree, and abstract objects existing outside space and time, like the number 7. Systems of categories aim to provide a comprehensive inventory of reality by employing categories such as Substance t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apothecia
An ascocarp, or ascoma (: ascomata), 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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecideaceae
The Lecideaceae are a family (biology), family of lichen-forming fungi in the order Lecideales. It contains about 30 genus, genera and roughly 250 species. A major distinguishing characteristic of the family is the form of the ascomata, fruiting bodies: typically circular, dark, and without a . Most species in the family are lichenised with green algae, although a few species, scattered amongst several genera, are lichenicolous fungus, lichenicolous—they live on other lichens. Lecideaceae lichens tend to grow saxicolous lichen, on rocks, lignicolous lichen, wood, and terricolous lichen, soil. Several Lecideaceae species accelerate the weathering of rock surfaces, a process known as pedogenesis, by extending their hyphae into cracks and expelling rock flakes. This contributes to significantly faster weathering rates in certain environments, impacts various materials from natural rocks to man-made Sekishu roof tiles, and involves key biomolecules identified for survival and bio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emendation (zoology)
In zoological nomenclature, emendations are intentional alterations made to the spelling of taxon names. In bacteriological nomenclature, emendations are made to the circumscription of a taxon. All emendations are considered by default to be available names. An emendation may be "justified" (when the original spelling is demonstrably incorrect under the International Code of Zoological Nomenclature,International Commission on Zoological Nomenclature. 1999International Code of Zoological Nomenclature. 4th ed.London: The International Trust for Zoological Nomenclature. Article 32.5), or it may be "unjustified" (if the change violates the rules of the Code). A justified emendation is different from a " mandatory change" only in that the latter is required by the Code, under Article 34. An unjustified emendation is different from an " incorrect subsequent spelling" in that the latter is an unintentional change, while an emendation is explicitly intentional, and in that an incorrect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aino Henssen
Aino Marjatta Henssen (12 April 1925, Elberfeld – 29 August 2011, Marburg), was a German lichenologist and systematist. Her father, Gottfried Henssen, was a folklorist and her mother was Finnish. Education and career Henssen began her studies in biology in Freiburg, Germany, before continuing in Marburg. She obtained her doctorate in 1953, which focused on the physiology of the aquatic plant '' Spirodela polyrhiza''. In 1963, she became the curator of the ''Botanisches Institut'' at '' Philipps-Universität'' in Marburg, Germany. Following her habilitation in 1965, she was appointed in 1970 to the position of associate professor for thallophyte studies. She retired in 1990. "Short biographies of 104 lichenologists who have played a key role in the development of German lichenology are provided." ("Aino Henssen" on pp. 41–43) Contributions Henssen made many advancements to the taxonomic knowledge of cyanolichens and wrote a textbook on the subject. This book reorganized the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascus
An ascus (; : asci) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or species can occur in numbers of one (e.g. '' Monosporascus cannonballus''), two, four, or multiples of four. In a few cases, the ascospores can bud off conidia that may fill the asci (e.g. '' Tympanis'') with hundreds of conidia, or the ascospores may fragment, e.g. some '' Cordyceps'', also filling the asci with smaller cells. Ascospores are nonmotile, usually single celled, but not infrequently may be coenocytic (lacking a septum), and in some cases coenocytic in multiple planes. Mitotic divisions within the developing spores populate each resulting cell in septate ascospores with nuclei. The term ocular chamber, or oculus, refers to the epiplasm (the portion of cytoplasm not used in ascospore formation) that is surrounded by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
