|
Dissoderma Paradoxum
''Dissoderma'' is a genus of parasitic fungi in the family Squamanitaceae. Basidiocarps (fruit bodies) superficially resemble normal agarics (gilled mushrooms) but emerge from parasitized fruit bodies of deformed host agarics. Taxonomy ''Dissoderma'' was created in 1948 as a subgenus of '' Cystoderma'' and raised to generic rank in 1973. Though French mycologist Marcel Bon recognized and expanded the genus in 1999, most other mycologists considered ''Dissoderma'' synonymous with ''Squamanita''. Molecular research, based on cladistic analysis of DNA sequences, has however confirmed ''Dissoderma'' as a genus distinct from ''Squamanita''. A number of species previously referred to ''Squamanita'' have accordingly been transferred to ''Dissoderma''. Description ''Dissoderma'' species can be distinguished from ''Squamanita'' species by their violet-grey pilei (caps) and upper stipes (stems). The lower parts of the stipes are host tissue and as such are often distinct and differently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander H
Alexander is a male given name. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here are Aleksandar, Aleksander and Aleksandr. Related names and diminutives include Iskandar, Alec, Alek, Alex, Alexandre, Aleks, Aleksa and Sander; feminine forms include Alexandra, Alexandria, and Sasha. Etymology The name ''Alexander'' originates from the (; 'defending men' or 'protector of men'). It is a compound of the verb (; 'to ward off, avert, defend') and the noun (, genitive: , ; meaning 'man'). It is an example of the widespread motif of Greek names expressing "battle-prowess", in this case the ability to withstand or push back an enemy battle line. The earliest attested form of the name, is the Mycenaean Greek feminine anthroponym , , (/ Alexandra/), written in the Linear B syllabic script. Alaksandu, alternatively called ''Alakas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squamanitaceae
The Squamanitaceae are a family of fungi in the order Agaricales. All species in the family are agarics (gilled mushrooms). Species in two genera, '' Dissoderma'' and '' Squamanita'', are parasitic on other agarics. Members of the ''Squamanitaceae'' are found worldwide. Taxonomy The family was first proposed in 1981 by Dutch mycologist Walter Jülich. Its current circumscription is the result of molecular research, based on cladistic analysis of DNA sequences. File:Cystoderma carcharias 27630.jpg, '' Cystoderma carcharias'' File:Leucopholiota decorosa (Peck) O.K. Mill., T.J. Volk & Bessette 823455.jpg, '' Leucopholiota decorosa'' File:Floccularia albolanaripes 65197.jpg, ''Floccularia albolanaripes ''Floccularia albolanaripes'' is a species of fungus in the family Agaricaceae. Mushrooms are characterized by their yellow caps with a brownish center and scales over the margin, and the conspicuous remains of a partial veil that is left on the ...'' File:Squamanita umbonata 7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hebeloma
''Hebeloma'' is a genus of fungi in the family Hymenogastraceae. Found worldwide, it contains the poison pie or fairy cakes ''(Hebeloma crustuliniforme)'' and the ghoul fungus ''( H. aminophilum)'', from Western Australia, which grows on rotting animal remains. Etymology The generic name is a compound Ancient Greek word ''hēbē'' (ἥβη), "youth" or "puberty" and the suffix -''loma'' (λόμα), a fringe (pertaining to the fungal veil). Thus, ''Hebeloma'' translates as "fringe of youth", in reference to how the fungal veil is only seen in immature specimens. Taxonomic placement The placement of the genus ''Hebeloma'' within the fungal taxonomic tree has varied over time. Historically it has been most often placed in the order Agaricales but was placed Cortinariales in the 8th edition of the Dictionary of the Fungi. The most recent inter-generic placement (Knudsen & Vesterholt, 2nd ed, 2012)) places it the family Hymenogastraceae within Agaricales The fungal order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galerina
''Galerina'' is a genus of small brown-spore saprobic fungi (colloquially often ''mushrooms''), with over 300 species found throughout the world from the far north to remote Macquarie Island in the Southern Ocean. The genus is most noted for some extremely poisonous species which are occasionally confused with hallucinogenic species of ''Psilocybe''. Species are typically small and hygrophanous, with a slender and brittle stem. They are often found growing on wood, and when on the ground have a preference for mossy habitats. ''Galerina'' means ''helmet-like''. Taxonomic definition The genus ''Galerina'' is defined as small mushrooms of mycenoid stature, that is, roughly similar in form to '' Mycena'' species: a small conical to bell-shaped cap, and gills attached to a long and slender cartilaginous stem. Species have a pileipellis that is a cutis, and ornamented spores that are brown in deposit, where the spore ornamentation comes from an extra spore covering. Descript ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stipe (mycology)
In mycology, a stipe () is the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal tissue. In many instances, however, the fertile hymenium extends down the stipe some distance. Fungi that have stipes are said to be stipitate. The evolutionary benefit of a stipe is generally considered to be in mediating spore dispersal. An elevated mushroom will more easily release its spores into wind currents or onto passing animals. Nevertheless, many mushrooms do not have stipes, including cup fungi, puffballs, earthstars, some polypores, jelly fungi, ergots, and smuts. It is often the case that features of the stipe are required to make a positive identification of a mushroom. Such distinguishing characters include: # the texture of the stipe (fibrous, brittle, chalky, leathery, firm, etc.) # whether it has remains of a partial veil (such as an annulus or cortina) or unive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pileus (mycology)
The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp ( fungal fruiting body) that supports a spore-bearing surface, the hymenium.Moore-Landecker, E: "Fundamentals of the Fungi", page 560. Prentice Hall, 1972. The hymenium ( hymenophore) may consist of lamellae, tubes, or teeth, on the underside of the pileus. A pileus is characteristic of agarics, boletes, some polypores, tooth fungi, and some ascomycetes. Classification Pilei can be formed in various shapes, and the shapes can change over the course of the developmental cycle of a fungus. The most familiar pileus shape is hemispherical or ''convex.'' Convex pilei often continue to expand as they mature until they become flat. Many well-known species have a convex pileus, including the button mushroom, various '' Amanita'' species and boletes. Some, such as the parasol mushroom, have distinct bosses or umbos and are described as '' umbonate''. An umbo is a knobby protrusion at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNA Sequences
A nucleic acid sequence is a succession of bases signified by a series of a set of five different letters that indicate the order of nucleotides forming alleles within a DNA (using GACT) or RNA (GACU) molecule. By convention, sequences are usually presented from the 5' end to the 3' end. For DNA, the sense strand is used. Because nucleic acids are normally linear (unbranched) polymers, specifying the sequence is equivalent to defining the covalent structure of the entire molecule. For this reason, the nucleic acid sequence is also termed the primary structure. The sequence has capacity to represent information. Biological deoxyribonucleic acid represents the information which directs the functions of an organism. Nucleic acids also have a secondary structure and tertiary structure. Primary structure is sometimes mistakenly referred to as ''primary sequence''. Conversely, there is no parallel concept of secondary or tertiary sequence. Nucleotides Nucleic acids cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladistic
Cladistics (; ) is an approach to biological classification in which organisms are categorized in groups (" clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is typically shared derived characteristics (synapomorphies'')'' that are not present in more distant groups and ancestors. However, from an empirical perspective, common ancestors are inferences based on a cladistic hypothesis of relationships of taxa whose character states can be observed. Theoretically, a last common ancestor and all its descendants constitute a (minimal) clade. Importantly, all descendants stay in their overarching ancestral clade. For example, if the terms ''worms'' or ''fishes'' were used within a ''strict'' cladistic framework, these terms would include humans. Many of these terms are normally used paraphyletically, outside of cladistics, e.g. as a ' grade', which are fruitless to precisely delineate, especially when including extinct species. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetics
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squamanita
''Squamanita'' is a genus of parasitic fungi in the family Squamanitaceae. Basidiocarps (fruit bodies) superficially resemble normal agarics (gilled mushrooms) but emerge from parasitized fruit bodies of deformed host agarics. Taxonomy The genus was created in 1946 by Swiss mycologist Emil Imbach to accommodate an unusual agaric species, ''Squamanita schreieri'', which L. Schreier had earlier described and illustrated as "''Tricholoma'' X". In 1965 Dutch mycologist Cornelis Bas expanded the genus to five species, all of which were characterized by arising from "sclerotial bodies". The possibility that ''Squamanita'' might be parasitic on other agarics (the remains of which formed the "sclerotial bodies") was noted by British mycologist Derek Reid in 1983. The discovery of a host fruit body that formed its own pileus together with three ''Squamanita'' pilei confirmed the parasitic nature of the genus, a discovery subsequently featured in ''Nature'' under the title 'Mycological m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Bon
Marcel Bon (17 March 1925 – 11 May 2014)http://fmbds.org/wp-content/uploads/2014/06/CAFAM-2014-CR-complet.pdf was one of France's best known field mycologists. He was born in Picardy in 1925 and came to mycology through general botany, and pharmacology. He lived at Saint-Valery-sur-Somme, a quaint little town on the mouth of the river Somme, in Picardy, Northern France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan ar ..., which was a former artists' and writers' retreat, and is now a popular tourist town. In 1987, along with two artists (John Wilkinson, and Denys Ovenden) he produced a comprehensive field guide for mycologists, ''The Mushrooms and Toadstools of Britain and North-western Europe''. His other skills were as a pianist, an artist, and a skier. Bibliography *''The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycologist
Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties, their taxonomy and their use to humans, including as a source for tinder, traditional medicine, food, and entheogens, as well as their dangers, such as toxicity or infection. A biologist specializing in mycology is called a mycologist. Mycology branches into the field of phytopathology, the study of plant diseases, and the two disciplines remain closely related because the vast majority of plant pathogens are fungi. Overview Historically, mycology was a branch of botany because, although fungi are evolutionarily more closely related to animals than to plants, this was not recognized until a few decades ago. Pioneer mycologists included Elias Magnus Fries, Christian Hendrik Persoon, Anton de Bary, Elizabeth Eaton Morse, and Lewis David von Schweinitz. Beatrix Potter, author of ''The Tale of Peter Rabbit'', also made significant contributions to the field. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
