Nagamune Kosuke, Hosaka Kentaro, Kigawa Shiro, Sugawara Ryo, Sotome Kozue, Nakagiri Akira, Endo Naoki
aGraduate School of Sustainability Science, Tottori University.
bDepartment of Botany, National Museum of Nature and Science.
Mycoscience. 2024 May 20;65(3):111-122. doi: 10.47371/mycosci.2024.02.002. eCollection 2024.
In 2017, two candidate species of were reported from Japan, with the Japanese names "" and "". However, to date, no taxonomic study or formal description has been undertaken for these two species. In the present study, we conducted comprehensive morphological and molecular phylogenetic examinations of "" and "", and compared them to known species within the genus . We performed phylogenetic analyses on a concatenated dataset, including the internal transcribed spacer region of ribosomal RNA, RNA polymerase II largest subunit, and translation elongation factor-1 alpha genes. "" formed a clade with , which was recently described from China, whereas "" formed a distinct independent clade. We identified the former as . based on molecular phylogenetic analyses and morphological observations. However, the Japanese specimens displayed dextrinoid cheilocystidia and caulocystidia as well as the inamyloidity of basidiospores, which differed from the original description of . based on the materials from China. "" was characterized by its remarkably dense lamellae and could be distinguished from known species by the combination of absent pleurocystidia and presence of bowling pin-shaped cheilocystidia. Here, we describe "" as a new species, named , in the section .
2017年，日本报道了两种候选物种，其日语名称分别为“”和“”。然而，迄今为止，尚未对这两个物种进行分类学研究或正式描述。在本研究中，我们对“”和“”进行了全面的形态学和分子系统发育研究，并将它们与该属内的已知物种进行了比较。我们对一个串联数据集进行了系统发育分析，该数据集包括核糖体RNA的内部转录间隔区、RNA聚合酶II最大亚基和翻译延伸因子-1α基因。“”与最近在中国描述的形成一个分支，而“”形成一个独特的独立分支。基于分子系统发育分析和形态学观察，我们将前者鉴定为。然而，日本标本显示出糊精样的唇囊状体和柄生囊状体以及担孢子的非淀粉样性质，这与基于中国材料对的原始描述不同。“”的特征是其菌褶非常密集，并且可以通过无侧囊状体和存在保龄球瓶形唇囊状体的组合与已知的物种区分开来。在此，我们将“”描述为一个新物种，命名为，属于该组。
