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Peniophora
''Peniophora'' is a genus of fungi which are plant pathogens. Members of the genus belong to the class Basidiomycetes, order Russulales, and family Peniophoraceae. The genus is widespread, and contains 62 species.〔 The species of ''Peniophora'' are resupinate, or crust-like, and are described as corticioid. A number of its members are parasitised by other fungi. For example, ''Tremella mesenterica'' is a parasite to several species of ''Peniophora''.〔
== Taxonomy and classification ==
The genus was first described by Mordecai Cubitt Cooke in 1879. The type species is ''Peniophora quercina'', initially named ''Thelephora quercina'' by Christian Hendrik Persoon in 1801 before being transferred to ''Peniophora'' by Cooke in 1879.〔 However, this species was also chosen as the type species for the genus ''Corticium'' as defined by Persoon in 1794.〔 Until 1981 the starting point for the nomenclature of the corticioid fungi was the publication of Fries' first volume of the ''Systema mycologicum'', which was set at January 1, 1821. ''Corticium'' Persoon (1794) was therefore a devalidated name because it was published before the starting point. Mycologists of the later 19th and 20th centuries, including Patouillard (1900),〔 Burt (1914–26),〔 and Bourdot and Galzin (1928)〔 distinguished species of ''Peniophora'' Cooke by their hymenial cystidia from species of ''Corticium'' Persoon, which lacked them. Despite being synonyms under the International Code of Botanical Nomenclature (ICBN), ''Corticium'' and ''Peniophore'' were used in this encompassing sense well into the 20th century. Changes made to the ICBN in 1981 included moving the starting point date for fungi back to May 1, 1753, the publication date of Linnaeus' ''Species plantarum''. Names published between 1753 and 1821 (including ''Corticium'') are now considered valid.
When Cooke described ''Peniophora'', he incorporated many crustlike species whose fruit bodies possess in the hymenium sterile, hair-like structures termed cystidia. Subsequent investigators, such as Bresadola and Burt accepted and expanded upon Cooke's concept of the genus, placing in it nearly all corticiaceous species that produced cystidia. Often, other taxonomically significant characters were not fully considered, and as a result, ''Peniophora'' soon became a heterogeneous assemblage of species. A number of morphological studies were carried out in the 20th century to better characterize the genus. Bourdot and Galzin (1912, 1928) were among the first investigators to recognize that certain species within the genus had more distinct affinities with each other than with other members of the genus. This prompted them to divide the genus into sections and groups of seemingly morphologically related species, such as the sections ''Coloratae'' and ''Membranaceae''.〔 Later, several species of the section ''Membranaceae'' would be transferred into the genus ''Phanerochaete''.〔 Later attempts to refine the infrageneric classification of ''Peniophora'' included morphology, physiology, development, cytogenetics, cytology and biochemistry.〔〔〔〔〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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