Abstract—The diversity of entomopathogenic fungi, including, inter alia, members of the genus Beauveria, has been assessed insufficiently in Northwestern Russia. With respect to the contemporary taxonomical changes based on molecular markers, the available data are poor and need to be improved. We have established the species and intraspecies diversity of sixty Beauveria spp. isolates obtained from dead insects collected in Leningrad (2017), Novgorod (2018), Vologda (2018), and Pskov (2013, 2018) oblasts and in the Republic of Karelia (2017). Most fungi were isolated from beetles of the subfamily Scolytinae. Beauveria pseudobassiana was the predominant species in the studied subset (with an occurrence of 75.0%). B. bassiana (13.3%) and B. caledonica (11.7%) were isolated in smaller quantities. The latter species was considered rare for Russia; only one finding has been registered up to this time. Molecular analysis of the Bloc and tef1α loci allowed the designation of a new broad clade within B. pseudobassiana, comprised of haplotypes that had not been published in the nucleotide sequence databases previously. All other clades of the found species have a broad geographical distribution.

摘要：在俄罗斯西北部，昆虫病原真菌（包括白僵菌属成员）的多样性尚未得到充分评估。对于当代基于分子标记的分类学变化，现有数据贫乏，需要改进。我们已经确定了 60 个白僵菌属的物种和种内多样性。从列宁格勒（2017年）、诺夫哥罗德（2018年）、沃洛格达（2018年）和普斯科夫（2013年、2018年）州以及卡累利阿共和国（2017年）收集的死昆虫中获得的分离株。大多数真菌是从Scolytinae亚科的甲虫中分离出来的。白僵菌是研究子集中的主要物种（出现率为 75.0%）。分离出的B. bassiana (13.3%) 和B. caledonica (11.7%) 数量较少。后一种物种在俄罗斯被认为是罕见的。截至目前，仅登记了一项调查结果。Bloc 和tef1 α 基因座的分子分析允许在B.pseudobassiana中指定一个新的广泛进化枝，该进化枝由之前未在核苷酸序列数据库中发表的单倍型组成。已发现物种的所有其他分支都有广泛的地理分布。