Two new species in the Russula (Russulaceae, Basidiomycota) crown clade from Indian Himalaya
Two new species in the Russula (Russulaceae, Basidiomycota) crown clade from Indian Himalaya
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DOI：
10.5852/ejt.2021.782.1595
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发表时间：
2021-12-14
影响因子：
1.2
通讯作者：
Buyck, Bart
中科院分区：
文献类型：
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作者：
Ghosh, Aniket;Das, Kanad;Buyck, Bart
2个种，分别为Rusula adwanitekae A.Ghosh，K.Das&Buyck sp.11月和红菇Russula Purpureozonata K.Das，A.Ghosh&Buyck sp.11月根据其形态特征和系统发育推论，提出为印度喜马拉雅地区的蘑菇新分类群。这两个种都属于红菇亚属的冠支系，但与不同的亚组有亲缘关系。亚组。拉里西亚罗曼。和亚组。Decolorantes Maire。阿德瓦尼特鲁苏拉(Russula adwanitekae sp.)11月是在混合温带森林中采集的，在那里它最有可能与针叶树有关。它有别于亚组中几个外观相似的小而温和的种，具有深色的孢子印记和略带红色的淡紫色，兰花紫色或浅灰色到深洋红色的菌盖。根据ITS序列数据(NrITS)或地理分布。紫露菇Russula Purpureozonata sp.11月与致密冷杉同源，并具有脱色的所有典型特征。孢子上的淀粉样斑点，有毛球孢子菌，变红然后变黑，均匀的片层和彩色的孢子印记。它让人想起北美的卡里福尼亚罗非鱼。和R.Magna Beardslee在显微镜下观察，但孢子明显较小，且在独特的着色和同心带状的菌盖边缘上进一步不同。这两个种的宏观和微观形态特征都得到了说明。讨论了它们的栖息地、分布及其与近缘种的关系。
Two species, namely Russula adwanitekae A.Ghosh, K.Das & Buyck sp. nov. and Russula purpureozonata K.Das, A.Ghosh & Buyck sp. nov. are proposed herein as new mushroom taxa from the Indian Himalaya based on their morphological features and ITS-based phylogenetic inferences. Both species belong to the crown clade of Russula subgenus Russula but with affinities to different subsections, viz. subsect. Laricinae Romagn. and subsect. Decolorantes Maire, respectively. Russula adwanitekae sp. nov. was collected in mixed temperate forests where it is most likely associated with conifers. It is distinct from several similarly looking, small, mild species with dark spore print and reddish lilac, orchid purple or greyish to deep magenta colored pileus in subsect. Laricinae by its sequence data (nrITS) or geographic distribution. Russula purpureozonata sp. nov. associates with Abies densa Griff., and possesses all typical features of Decolorantes, viz. the amyloid suprahilar spot on the spores, presence of pileogloeocystidia, the reddening then blackening context, equal lamellae and colored spore print. It reminds of North American R. californiensis Burl. and R. magna Beardslee under the microscope but has distinctly smaller spores and differs further in the unique coloration and concentrically zonated pileus margin. Macro-and micromorphological features are illustrated for both species. Their habitats, distributions and relationships with allied species are discussed.