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Pluteus nevadensis
''Pluteus nevadensis'' is a species of fungus in the agaric family Pluteaceae. Described as new to science in 2010, the species is known only from subtropical and pine forests in Mexico, where it grows on rotting pine and oak wood. Fruit bodies (mushrooms) have red-orange caps up to in diameter with a shape ranging from conic, convex, or flattened, depending on their age. The silky yellow stems are up to long. It is similar in appearance to ''Pluteus aurantiorugosus'', with which it shares an orange- or scarlet-colored cap and a yellow stem. ''P. nevadensis'' can be distinguished from this and other superficially similar ''Pluteus'' species by differences in microscopic characteristics.
==Taxonomy==
The species was described by Olivia Rodríguez in 2010 in the journal ''Mycotaxon'', based on collections made in 1991. The holotype material was collected on the Colima volcano, in the Municipality of Zapotlán el Grande, at an elevation of . The species was formerly referred to ''Pluteus aurantiorugosus'',〔〔 with which it bears a close resemblance. After close examination and comparison of the two species, the authors concluded that the differences in morphology and DNA sequence were sufficient to warrant describing a new species.〔
According to Rolf Singer's infrageneric classification of the genus ''Pluteus'',〔 the fungus belongs in the section ''Celluloderma''.〔 Species in this section have pleurocystidia that are either absent or non-metuloid. Furthermore, the majority have a cap cuticle comprising short club-shaped or spheropedunculate (somewhat spherical with a stem) cells, that may or may not be mixed with elongated cystidia-like cells.〔 Other species in ''Celluloderma'' include ''P. romellii'', ''P. aurantiorugosus'', ''P. pulverulentus'', ''P. thompsonii'', and ''P. horakianus''. Molecular analyses of internal transcribed spacer DNA sequences supports the placement of ''P. nevadensis'' in ''Celluloderma'', and further suggest that it has a sister relationship with ''P. horakianas''. The specific epithet ''nevadensis'' refers to the mountain, Nevado de Colima, where the type material was collected.〔
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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