Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, Yunnan, People's Republic of China.
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand.
PLoS One. 2019 Jun 26;14(6):e0217982. doi: 10.1371/journal.pone.0217982. eCollection 2019.
During our studies on fungal diversity from plant substrates, a new species of Valsaria was isolated from dead branches of Ostrya carpinifolia. The taxon is morphologically similar to other taxa in Valsariaceae and is characterized by pseudostromata, apically free pseudoparaphyses, bitunicate asci, and dark brown, 2-celled ascospores. However, it differs from extant species in number of guttules and ornamentation of spore. It is introduced herein as Valsaria ostryae sp. nov. within the family Valsariaceae. Multigene phylogenies based on combined LSU, ITS and RPB2 DNA sequence data generated from maximum likelihood, maximum parsimony and MrBayes analyses indicate that V. ostryae is basal to V. lopadostomoides and V. rudis and its establishment as a new species is strongly supported. No discordance was found between our morphological and phylogenetic species boundaries as postulated by other researchers and our molecular data strongly supports ornamentation of spore as useful for species delineation. Valsaria species do not appear to be host specific. Full morphological details are provided herein and phylogenetic relationships of Valsaria species are also discussed in light with host association.
在对植物基质中的真菌多样性进行研究时，我们从麻栎的枯枝上分离到一种瓦萨利亚属（Valsaria）的新种。该分类群在形态上与瓦萨利亚科（Valsariaceae）的其他种相似，其特征为假菌核、顶部分离的拟侧丝、双壁的子囊、深棕色的 2 细胞子囊孢子。然而，它在黏液滴的数量和孢子的纹饰上与现有的种不同。本文将其作为瓦萨利亚属的一个新种，即麻栎瓦萨利亚（Valsaria ostryae）。基于 LSU、ITS 和 RPB2 DNA 序列的多基因系统发育分析，包括最大似然法、最大简约法和 MrBayes 分析，表明 V. ostryae 位于 lopadostomoides 和 rudis 瓦萨利亚种的基部，其作为一个新种的建立得到了强烈支持。我们的形态学和系统发育种边界与其他研究人员提出的边界一致，没有不吻合的地方，而且我们的分子数据强烈支持孢子纹饰在物种划分中的有用性。瓦萨利亚种似乎没有宿主专一性。本文提供了完整的形态学细节，并根据宿主相关性讨论了瓦萨利亚种的系统发育关系。
