一株寄生蛴螬的被毛孢新种

A new Hirsutella species parasitic on grub larvae (Coleoptera)

摘要:

【目的】对寄生鞘翅目幼虫蛴螬的虫生真菌标本GZUIFR-lgs-1进行描述和鉴定。【方法】基于形态特征比较结合系统发育分析进行鉴定。【结果】该种通过形态特征产孢细胞单生，透明，多数与营养菌丝成近直角，基部具疣且明显膨大(19?27) μm×(2.7?3.6) μm，颈部长(12.0?14.5) μm，顶端呈螺旋状扭曲，偶有再育；分生孢子透明、光滑，橘瓣状，单生或偶有双生，外具黏液，大小为(4.8?6.0) μm×(2.4?3.6) μm，而与被毛孢属已知种相区别。基于ITS位点的系统发育分析支持形态学鉴定的结果。【结论】综合形态特征比较及系统发育分析结果，该种为被毛孢属的一个新的分类单元，命名为雷公山被毛孢，Hirsutella leigongshanensis。

Abstract:

[Objective] A new entomogenous fungi (GZUIFR-lgs-1), which was parasitic on grub larvae was identified and described. [Methods] The analysis mainly based on phenotypic characteristics and molecular phylogeny. [Results] The strain distinguished from the other Hirsutella species by phialides solitary, hyaline, occasionally proliferation and near right angle to hyphae, with distinctly swollen and verrucose base (19?27) μm×(2.7?3.6) μm, twisting in helices at the apex, neck (12.0?14.5) μm long; Conidia hyaline and smooth in mucous sheath, like orange segments (4.8?6.0) μm×(2.4?3.6) μm, single or occasionally in pairs. The result of phylogenic analysis based on ITS loci supported the morphological identification. [Conclusion] The specimen GZUIFR-lgs-1 is a new species in the genus Hirsutella, supported by the phenotypic traits and molecular analysis, named Hirsutella leigongshanensis.