Dong Junhong, Deng Qiaohua, Chen Minglan, Chen Daxiang, Zhou Chunqin, Zhao Changlin
College of Forestry, Southwest Forestry University, Kunming 650224, China Southwest Forestry University Kunming China.
Tongbiguan Provincial Nature Reserve, Mangshi 678499, China Tongbiguan Provincial Nature Reserve Mangshi China.
MycoKeys. 2025 Jan 8;112:35-58. doi: 10.3897/mycokeys.112.137098. eCollection 2025.
In the ecosystem, wood-inhabiting fungi play an indispensable role in wood degradation and the cycle of substances. They are regarded as the "key player" in the process of wood decomposition because of their ability to produce various enzymes that break down woody lignin, cellulose, and hemicellulose. In this study, four new wood-inhabiting fungal species, , , , and , were collected from southwestern China and were proposed based on the morphological and molecular evidence. is characterised by the felted-membranous to pellicular basidiomata with pinkish to slightly salmon-buff, a smooth hymenial surface, a monomitic hyphal system, and generative hyphae bearing simple-septate and subglobose, thin-walled, echinulate basidiospores measuring as 8-8.8 × 7-8 µm. is characterised by the resupinate basidiomata with pinkish-white to pink, a tuberculate hymenial surface, a monomitic hyphal system and generative hyphae bearing clamp connections, and subglobose, slightly thick-walled, smooth basidiospores measuring as 6-7.5 × 5.5-7.3 µm. is characterised by the coriaceous basidiomata with grey to grey-buff, a tuberculate hymenial surface, a monomitic hyphal system and generative hyphae bearing clamp connections, and globose, slightly thick-walled, smooth basidiospores measuring as 7-9.5 × 6.5-8.5 µm. is characterised by the coriaceous basidiomata with straw to cinnamon to ocherous, a tuberculate hymenial surface, a monomitic hyphal system and generative hyphae bearing clamp connections, and broadly ellipsoid, slightly thick-walled, smooth basidiospores measuring as 7.5-9 × 6.2-7.5 µm. Sequences of the internal transcribed spacer (ITS) and large subunit (nrLSU) markers of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony, and Bayesian inference methods. Phylogenetic analyses of ITS+nrLSU nuclear RNA gene regions showed that four new species were assigned to the genera and . The phylogenetic tree inferred from the ITS sequences revealed that was closely associated with and . Based on the ITS sequences, the topology showed that was retrieved as a sister to . The taxon forms a monophyletic lineage. The other one species, , was closely associated with and .
在生态系统中，木生真菌在木材降解和物质循环中发挥着不可或缺的作用。由于它们能够产生各种分解木质素、纤维素和半纤维素的酶，因此被视为木材分解过程中的“关键角色”。在本研究中，从中国西南部采集到四种新的木生真菌物种， 、 、 和 ，并基于形态学和分子证据对其进行了描述。 的特征在于其菌盖为毡状膜质至薄膜质，呈粉红色至浅鲑鱼色，子实层表面光滑，菌丝系统单一，生殖菌丝具简单隔膜，担孢子近球形，薄壁，具小刺，大小为8-8.8×7-8 µm。 的特征在于其平伏的担子果，呈粉白色至粉红色，子实层表面具瘤状突起，菌丝系统单一，生殖菌丝具锁状联合，担孢子近球形，壁稍厚，表面光滑，大小为6-7.5×5.5-7.3 µm。 的特征在于其革质的担子果，呈灰色至灰黄色，子实层表面具瘤状突起，菌丝系统单一，生殖菌丝具锁状联合，担孢子球形，壁稍厚，表面光滑，大小为7-9.5×6.5-8.5 µm。 的特征在于其革质的担子果，呈稻草色至肉桂色再至赭色，子实层表面具瘤状突起，菌丝系统单一，生殖菌丝具锁状联合，担孢子宽椭圆形，壁稍厚，表面光滑，大小为7.5-9×6.2-7.5 µm。对所研究样本的内转录间隔区（ITS）和大亚基（nrLSU）标记序列进行了测定，并采用最大似然法、最大简约法和贝叶斯推断法进行了系统发育分析。ITS+nrLSU核RNA基因区域的系统发育分析表明，这四个新物种被归入 和 属。从ITS序列推断的系统发育树显示， 与 和 密切相关。基于ITS序列，拓扑结构显示 被检索为 的姐妹种。分类单元 形成一个单系类群。另一个物种， ，与 和 密切相关。
