Four new species of the genus Hymenoscyphus (fungi) based on morphology and molecular data  

作　　者：ZHENG HuanDi ZHUANG WenYing 

机构地区：[1]State Key Laboratory of Mycology,Institute of Microbiology,Chinese Academy of Sciences

出　　处：《Science China(Life Sciences)》2013年第1期90-100,共11页中国科学（生命科学英文版）

基　　金：supported by the National Natural Science Foundation of China (31070015,31093440);the Knowledge Innovation Project of the Chinese Academy of Sciences (KSCX2-EW-J-6)

摘　　要：Four new species of Hymenoscyphus (H. brevicellulus, H. hyaloexcipulus, H. microcaudatus, and H. subsymmetricus) and a new Chinese record (H. subpallescens) are described. These five species share common characteristics: small apothecia (<3mm in diameter); hymenium whitish, pale yellow, to yellow in color; ectal excipulum of textura prismatica; asci arising from simple septa; ascospores scutuloid and guttulate; saprophytic nutrition; and leaf habitats, except for H. subsymmetricus, which grows on herbaceous stems. Phylogenetic analyses of internal transcribed spacer nuclear ribosomal DNA sequences, the universal DNA barcode for fungi, for 16 species in the genus indicated that these taxa were closely related to H. microserotinus, in accordance with their morphological features, but represented independent species. The distinguishing features of each new species from its relatives are discussed, and their phylogenetic relationships explored.Four new species of Hymenoscyphus （H. brevicellulus, H. hyaloexcipulus, H. microcaudatus, and H. subsymmetricus） and a new Chinese record （H. subpallescens） are described. These five species share common characteristics： small apothecia （〈3 mm in diameter）; hymenium whitish, pale yellow, to yellow in color; ectal excipulum of textura prismatica; asci arising from simple septa; ascospores scutuloid and guttulate; saprophytic nutrition; and leaf habitats, except for H. subsymmetricus, which grows on herbaceous stems. Phylogenetic analyses of internal transcribed spacer nuclear ribosomal DNA sequences, the uni- versal DNA barcode for fungi, for 16 species in the genus indicated that these taxa were closely related to H. microserotinus, in accordance with their morphological features, but represented independent species. The distinguishing features of each new species from its relatives are discussed, and their phylogenetic relationships explored.

关 键 词：Helotiaceae MORPHOLOGY sequence analyses TAXONOMY 

分 类 号：Q949.32[生物学—植物学] O561[理学—原子与分子物理]