菌物学报2026，Vol.45Issue(1)：17-33,17.DOI:10.13346/j.mycosystema.250213
寄生鳞翅目幼虫的线虫草属一新种:羽束梗孢状线虫草
Ophiocordyceps paraisarioidea sp.nov.(Hypocreales,Ophiocordycipitaceae),a novel species of Ophiocordyceps parasitizing lepidopteran larvae
摘要
Abstract
Ophiocordyceps is a diverse,widely distributed,and host-rich genus of entomogenous fungi,with over 400 species reported to date.The Hengduan Mountains in Yunnan of southwestern China,recognized as a global biodiversity hotspot,represent a major center of diversity for this genus.In this study,we describe a new species of Ophiocordyceps from Hengduan Mountains in Yunnan,designated Ophiocordyceps paraisarioidea sp.nov.,based on morphological observations and phylogenetic analyses using both single ITS sequences and a combined dataset of five loci(nr SSU,nr LSU,tef-1α,rpb1 and rpb2).Morphologically,this species is prone to misclassification as Paraisaria in virtue of stromatal structure,but it differs by having darker stromata,a spherical fertile part with apical protuberances,and multiseptate non-disarticulating ascospores.Five-gene phylogenetic analyses place O.paraisarioidea in the basal clade of Ophiocordyceps,clustering with Ophiocordyceps entomorrhiza.Nevertheless,the two species exhibit notable differences in morphology and host preference:O.paraisarioidea has dark brown stroma with grayish-white tips and parasitizes lepidopteran larvae,whereas O.entomorrhiza forms nearly black stromata and infects both larvae and adults of coleopteran insects(Carabus sp.).Notably,the lepidopteran host of O.paraisarioidea challenges the prevailing hypothesis that Coleopterans represent the ancestral hosts of Ophiocordyceps,implying the occurrence of multiple host shifts during the early evolutionary history.The discovery of O.paraisarioidea may provide valuable insight into the origin and early diversification of this genus.关键词
横断山区/多基因系统发育/线虫草属基部分支/球形可孕部/寄主转换/新种Key words
Hengduan Mountains/multigene phylogeny/the basal clade of Ophiocordyceps/spherical fertile part/host shift/new species引用本文复制引用
常衬心,张忠霞,邓丽萍,梁建东,俞琦,代永东..寄生鳞翅目幼虫的线虫草属一新种:羽束梗孢状线虫草[J].菌物学报,2026,45(1):17-33,17.基金项目
国家自然科学基金(32160005) （32160005）
贵州省微生物组与传染性疾病防控重点实验室(ZDSYS[2023]004) This work was supported by the National Natural Science Foundation of China(32160005)and the Guizhou Key Laboratory of Microbiome and Infectious Disease Prevention&Control(ZDSYS[2023]004). （ZDSYS[2023]004）
