During fungal surveys between 2012 and 2014 in pine-dominated forests of the western Himalayas in Pakistan, several collections of Pseudosperma (Agaricales, Inocybaceae) were made. These were documented, based on morphological and molecular data. During this work, three new species came to light, which are here formally described as Pseudosperma brunneoumbonatum, P. pinophilum and P. triacicularis. These species belong in the genus Pseudosperma fideMatheny et al. (2019) = Pseudosperma clade fideMatheny (2005) = Inocybe sect. Rimosae s.s. fideLarsson et al. (2009). Macro- and micro-morphological descriptions, illustrations and molecular phylogenetic reconstructions of the studied taxa are provided. The new species are differentiated from their close relatives by basidiospore size and colouration of basidiomata. Molecular phylogenetic relationships are inferred using ITS (ITS1–5.8S–ITS2), nrLSU and mtSSU sequence data. All three newly-described taxa likely share an ectomycorrhizal association with trees in the genus Pinus. In addition, five names are recombined in Inosperma, Mallocybe and Pseudosperma. These are Inosperma vinaceobrunneum, Mallocybe erratum, Pseudosperma alboflavellum, Pseudosperma friabile and Pseudosperma neglectum.

中文翻译：

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通过形态学和多位点系统发育重建揭示了来自巴基斯坦的假单胞菌新种（伞菌目，链球菌科）。

在 2012 年至 2014 年间在巴基斯坦喜马拉雅山西部以松树为主的森林中进行的真菌调查期间，收集了一些假精子（伞菌目、链球菌科）。这些是根据形态学和分子数据记录的。在这项工作中，发现了三个新物种，在此正式描述为 Pseudosperma brunneoumbonatum、P. pinophilum 和 P. triacicularis。这些物种属于 Pseudosperma fideMatheny 等人。(2019) = Pseudosperma clade fideMatheny (2005) = Inocybe 教派。Rimosae ss fideLarsson 等。(2009)。提供了所研究类群的宏观和微观形态学描述、插图和分子系统发育重建。新物种通过担子孢子的大小和担子纲的颜色与它们的近亲区分开来。使用 ITS (ITS1–5.8S–ITS2)、nrLSU 和 mtSSU 序列数据推断分子系统发育关系。所有三个新描述的分类群都可能与松属中的树木具有外生菌根关联。此外，在 Inosperma、Mallocybe 和 Pseudosperma 中重组了五个名称。它们是 Inosperma vinaceobrunneum、Mallocybe erratum、Pseudosperma alboflavellum、Pseudosperma friabile 和 Pseudosperma ignoreum。