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Pachykytospora
''Pachykytospora'' is a small genus of fungi in the family Polyporaceae. Species in the cosmopolitan genus cause white rot. There are about 10 species in the genus, with newest member described from European Russia in 2007. ''Pachykytospora'' species have fruit bodies that are resupinate (growing flat on the substrate surface), with light brown tubes. They are characterized by their uneven, ellipsoid spores, and the ''Polyporus''-like skeleton-binding hyphae.
==Taxonomy==
The genus was circumscribed by Czech mycologists František Kotlaba and Zdenek Pouzar in 1963. The type species, ''P. tuberculosa'', was originally described as ''Boletus tuberculosus'' by Augustin Pyramus de Candolle in 1815.〔 Species originally described as a member of ''Pachykytospora'' but later transferred to other genera include: ''Pachykytospora major'' G.Y.Zheng & Z.S.Bi 1989 (now in ''Megasporoporia''); ''Pachykytospora nanospora'' A.David & Rajchenb. 1992, ''Pachykytospora nepalensis'' T.Hatt. 2002, and ''Pachykytospora thindii'' Natarajan & Koland. 1993 (now ''Haploporus''). Norwegian mycologist and polypore authority Leif Ryvarden suggested that due to its large, grooved spores, ''Pachykytospora'' was in a phylogenetically isolated position in the Polyporaceae, although it shows some affinity to the genus ''Megasporoporia'', with which it shares the same hyphal system and type of rot. Unlike ''Pachykytospora'', however, ''Megasporoporia'' has smooth spores.〔 In a 2007 publication, Zmitrovich and colleagues suggested that there are nine species in the genus (and they described a tenth, ''P. wasseri'');〔 in 1994, Ryvarden and Robert Lee Gilbertson indicated five species.〔
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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