一种罕见虫生真菌蜻蜓层束梗孢的重新描述

摘要

A dragonfly entomopathogenic fungus was identified as Hymenostilbe odonatae Kobayasi by using the morphological comparison,molecular phylogeny (ITS1 -5.8S-ITS2 rDNA sequences)and split network analysis.The main characteristics of the fungus are that the orange synnemata is developed from all body in-ternode membrane and the dorsum of the host is 0.4-0.5 cm long,1 79-333 μm wide.The Phialides are cy-lindrical,9.7-1 4×3.2 μm,arranged closely into hymenium shape,and prolificated with small terrier at the top.Conidia are produced singly,cylindrical,6.5-9.7×1 .1 -2.2 μm.The phylogenic analysis and splits net-work analysis also proved that the specimens belong to Hymenostilbe odonatae Kobayasi,which had been known from China but there had been no detailed description.%采用形态比较、分子系统发育和拆分网络分析等方法，对寄主为蜻蜓的虫生真菌进行分类鉴定。结果显示：该真菌为 Hymenostilbe odonatae Kobayasi，主要形态特征为橘黄色孢梗束从寄主周身节间膜和背部长出，长0.4－0.5 cm，宽179－333μm；瓶梗柱状，9.7－14×3.2μm，紧密排列成子实层状，顶部具再育小梗；分生孢子为柱状单生，6.5－9.7×1.1－2.2μm。系统发育分析和进化网络分析也证明该种为蜻蜓层束梗孢，为我国已知种但未被详细描述。