<i>Tricholoma alpinum</i>, sp. nov., under five-needle pines in alpine and subalpine zones in Japan

Alpine regions in Japan are characterized by the Siberian dwarf pine, <i>Pinus pumila</i>. Although these regions are conserved as national parks due to their unique biome, few reports of the fungal biota are available. We examined mushroom fungi under such vegetation and found a unique yellowish-capped <i>Tricholoma</i> species. Multilocus molecular phylogenetic analyses and morphological observation of specimens showed that the <i>Tricholoma</i> species is very similar to <i>T. fumosoluteum</i> known in North America. The Japanese yellowish-capped <i>T</i>. aff. <i>fumosoluteum</i> had larger basidiospores and basidia and shorter pileipellis hyphae compared with <i>T. fumosoluteum</i>. Therefore, we describe the Japanese entity as a new species, <i>T. alpinum</i>.

日本阿尔卑斯山区以西伯利亚矮松（Pinus pumila）为标志性植被。该区域因拥有独特的生物群系而被列为国家公园加以保护，但目前针对其中真菌群落的研究报道较为匮乏。我们对该类植被下的伞菌开展了调查，发现了一种具有淡黄色菌盖的独特口蘑属（Tricholoma）物种。通过多位点分子系统发育分析（multilocus molecular phylogenetic analyses）与标本形态学观察，证实该口蘑属物种与北美已知的烟黄口蘑（T. fumosoluteum）极为相似。与烟黄口蘑相比，日本的烟黄口蘑近缘种（T. aff. fumosoluteum）拥有更大的担孢子（basidiospores）和担子（basidia），且菌盖表皮菌丝（pileipellis hyphae）更短。因此，我们将该日本类群描述为一个新物种——阿尔卑斯口蘑（T. alpinum）。

搜集汇总

背景与挑战

背景概述

该数据集描述了在日本高山和亚高山带五针松林下发现的一种新Tricholoma物种——T. alpinum，通过多基因座分子系统发育和形态学比较分析，确认其与北美物种T. fumosoluteum相似但具有差异特征，如更大的担孢子和更短的菌盖表皮菌丝。数据集突出了该物种的生态分布（环北极分布）和分类学意义（作为新分类单元），并提供了相关原始数据，适用于微生物学、生态学和进化生物学等领域的研究。