菌物学报2026，Vol.45Issue(9)：42-54,13.DOI:10.13346/j.mycosystema.260109
贵州喀斯特森林中鳞翅虫草属一新种:长链鳞翅虫草
Samsoniella longicatenata(Hypocreales,Cordycipitaceae):a new species from the karst forest of Guizhou,southwest China
摘要
Abstract
Samsoniella is an important genus recently segregated from the Isaria-like complex,characterized by high species diversity,a wide range of hosts,and broad ecological distribution.During field investigations in the karst region of Guizhou,a cordycipitoid specimen was collected from a broad-leaved forest in Baiyunshan Scenic Area,Changshun county,Guizhou Province.Through isolation and purification,morphological examination,and phylogenetic analyses based on a five-locus dataset(nrSSU,nrLSU,tef-1 α,rpb1 and rpb2),the specimen was confirmed as a new species,and herein named Samsoniella longicatenata.Phylogenetic analyses reveal that S.longicatenata is closely related to S.coccinellidicola,S.guizhouensis,S.pupicola,S.simplicola,and S.tiankengensis.However,it can be clearly distinguished from these related species by its phialides that are solitary or opposite,lacking basal swelling,and conidia that are typically arranged in long chains(20-30 conidia per chain).In addition,a relatively comprehensive phylogenetic framework for the genus Samsoniella was reconstructed using a combined five-gene dataset,resolving five major phylogenetic clades within the genus.It is found that ITS sequences exhibit widespread haplotype sharing among different Samsoniella species.The discovery of S.longicatenata enriches the current knowledge on species diversity of Samsoniella from the karst forests of Guizhou.The genus-level phylogenetic framework established here demonstrates that ITS is unsuitable as a molecular marker for species identification and phylogenetic inference within this genus.Further studies on species diversity of Samsoniella in the karst forests of Guizhou are needful.关键词
贵州喀斯特地貌区/鳞翅虫草属/物种多样性/5基因系统发育分析/ITS序列单倍型共享/新种Key words
Guizhou karst landform area/Samsoniella/species diversity/five-locus phylogenetic analysis/ITS haplotype sharing/new species引用本文复制引用
岳成峰,张忠霞,邓丽萍,梁建东,俞琦,代永东,田维毅..贵州喀斯特森林中鳞翅虫草属一新种:长链鳞翅虫草[J].菌物学报,2026,45(9):42-54,13.基金项目
国家自然科学基金(32160005) （32160005）
贵州省基础研究面上项目(黔科合基础 MS[2026]677) （黔科合基础 MS[2026]677）
贵州省微生物组与传染性疾病防控重点实验室(ZDSYS[2023]004) （ZDSYS[2023]004）
贵州省科技计划项目(黔科合中引地[2025]024) This work was supported by the National Natural Science Foundation of China(32160005),the Guizhou Provincial Basic Research Program(Natural Science)(QKHJC-MS[2026]677),the Guizhou Key Laboratory of Microbiome and Infectious Disease Prevention&Control(ZDSYS[2023]004),and the Guizhou Provincial Science and Technology Program Project(QKHZYD[2025]024). （黔科合中引地[2025]024）
