Steccherinum fragile sp. nov. and S. subcollabens comb. nov. (Steccherinaceae, Polyporales), evidenced by morphological characters and phylogenetic analysis
Steccherinum fragile sp. nov. and S. subcollabens comb. nov. (Steccherinaceae, Polyporales), evidenced by morphological characters and phylogenetic analysis
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DOI：
10.11646/phytotaxa.483.2.3
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发表时间：
2021-02-10
期刊：
影响因子：
1.1
通讯作者：
Dai, Yu-Cheng
中科院分区：
文献类型：
--
作者：
Liu, Zhan-Bo;Dai, Yu-Cheng
本文报道了一种新的木栖多孔真菌--脆木孢（Steccherinumfragile sp. nov.）根据形态学和分子生物学证据，描述并举例说明了中国的。本种采自云南省，生长于被子植物腐朽木材的地面和底面。S. fragile的特征是一年生的生长习性，重新仰起的担子果，新鲜时有鲑鱼到桃孔，干燥时变成肉桂色浅黄色到粉红色浅黄色，边缘薄，有明显的根状结构，单丝菌丝系统，产生的菌丝薄到明显厚壁，有简单的隔膜，既不淀粉样也不嗜蓝。基于ITS + nLSU rDNA序列的系统发育分析表明，该新种属于Steccherinum，形成了一个单系系统，支持度为100%BS，100%BP，1.00BPP。此外，还推出了新组合S. subcollabens的模式标本和系统发育分析的基础上提出。在系统发育上，脆柄蕨与脆柄蕨关系密切。amapaense和S. subcollabens、S. formosanum和S. Collabens。形态学和分子生物学特征均证实了新种和新组合的归属。
A new poroid wood-inhabiting fungus in the family Steccherinaceae, Steccherinum fragile sp. nov., is described and illustrated from China based on morphological and molecular evidence. The species was collected in Yunnan Province, growing on the ground and undersides of rotten angiosperm wood. S. fragile is characterized by an annual growth habit, resupinate basidiocarps with salmon to peach pores when fresh becoming cinnamon buff to pinkish buff upon drying, a thin margin with distinct rhizomorphs, a monomitic hyphal system, generative hyphae thin- to distinctly thick-walled with simple septa, neither amyloid nor cyanophilous. The phylogenetic analysis based on ITS + nLSU rDNA sequences shows that the new species belongs to Steccherinum, forming a monophyletic lineage with strong support (100% BS, 100% BP, 1.00 BPP). In addition, a new combination, S. subcollabens, is also proposed based on examination of its type material and phylogenetic analysis. Phylogenetically, Steccherinum fragile is closely related to S. amapaense and groups with S. subcollabens, S. formosanum and S. collabens. Both morphological and molecular characters confirm the placement of the new species and combination in Steccherinum.