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Mycena fuscoaurantiaca
''Mycena fuscoaurantiaca'' is a species of mushroom in the Mycenaceae family.〔 First reported as a new species in 2007, the diminutive mushroom is only found in Kanagawa, Japan, where it grows on dead fallen twigs in lowland forests dominated by hornbeam carpinus and Chinese evergreen oak trees. The mushroom has a brownish-orange conical cap that has grooves extending to the center, and reaches up to in diameter. Its slender stem is colored similarly to the cap, and long—up to tall. Microscopic characteristics include the weakly amyloid spores (turning blue to black when stained with Melzer's reagent), the smooth, swollen cheilocystidia and pleurocystidia (cystidia on the gill edges and faces, respectively) with long rounded tips, the diverticulate hyphae of the cap cuticle, and the absence of clamp connections.
==Taxonomy, naming, and classification==
The mushroom was first collected by Japanese mycologist Haruki Takahashi in 1999 and, along with seven other ''Mycena'' species, identified as a new species in a 2007 publication. The specific epithet is derived from the Latin words ''fusco-'' (meaning "dark") and ''aurantiaca'' ("orange-yellow"), and refers to the color of the fruit bodies. Its Japanese name is ''Taisha-ashinagatake'' タイシャアシナガタケ(代赭足長茸).〔
Takahashi suggests that the species is best classified in the section ''Fragilipedes'', as defined by Dutch ''Mycena'' specialist Rudolph Arnold Maas Geesteranus.〔 Within the section, the North American species ''M. subfusca'' appears to be closely related to ''M. fuscoaurantiaca''. ''M. subfusca'' may be distinguished by its spindle- to broadly club-shaped cheilocystidia without a narrow neck, club-shaped to irregularly shaped caulocystidia, and lack of pleurocystidia.〔
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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