The genus of basidiomycetous fungi Cortinarius occurs worldwide, from subtropical to boreal latitudes. Although molecular systematics has triggered the study of these fungi in the Americas and Europe in the last two decades, there is still limited research on its diversity in large portions of the planet, such as the high mountain ranges of Asia. Several collections of Cortinarius were made during mycological field trips conducted between 2014 and 2018 in pure oak forests in the Pakistan Himalayas. An integrative framework combining morphological and phylogenetic data was employed for their study. As a result, the two species C. pakistanicus and C. pseudotorvus are here described as new to science. Detailed macro- and micro-morphological descriptions, including SEM images of spores, and a molecular phylogenetic reconstruction based on nrITS sequence data are provided and used to discriminate the new species from morphologically and phylogenetically close taxa. Whereas our phylogenetic tree inference gave unequivocal support for the inclusion of C. pseudotorvus within C. sect. Telamonia, the assignment of C. pakistanicus to any known sections remained elusive. These species likely establish ectomycorrhizal associations with trees in the genus Quercus, making this type of forest in the Pakistan Himalayas a promising focus for future research on the diversity of Cortinarius.

中文翻译：

---

Cortinarius pakistanicus和C. pseudotorvus：巴基斯坦喜马拉雅山橡树林中的两个新物种

担子菌真菌Cortinarius的种类遍布世界各地，从亚热带到北纬。尽管在过去的二十年中，分子系统学引发了对美洲和欧洲这些真菌的研究，但在地球上大部分地区（例如亚洲的高山山脉）对其真菌多样性的研究仍然有限。在2014年至2018年之间进行的真菌学实地考察期间，在巴基斯坦喜马拉雅山的纯橡树林中进行了数个Cortinarius的收藏。他们采用了结合形态学和系统发育数据的综合框架。结果，这两个物种C. pakistanicus和C. pseudotorvus在这里被描述为科学新手。详细的宏观和微观形态描述，包括孢子的SEM图像，并提供了基于nrITS序列数据的分子系统发育重建，并用于从形态和系统发育上接近的分类群中区分新物种。而我们的系统进化树推论明确地支持了假弯线虫在C. sect中的包含。特拉莫尼亚（Telamonia），将巴基斯坦C. pakistanicus分配到任何已知部分仍然难以捉摸。这些物种可能与栎属中的树木建立了外生菌根联系，使巴基斯坦喜马拉雅山的这类森林成为未来研究Cortinarius多样性的有希望的焦点。C. pakistanicus到任何已知部分的分配仍然难以捉摸。这些物种可能与栎属中的树木建立了外生菌根联系，使巴基斯坦喜马拉雅山的这类森林成为未来研究Cortinarius多样性的有希望的焦点。C. pakistanicus到任何已知部分的分配仍然难以捉摸。这些物种可能与栎属中的树木建立了外生菌根联系，使巴基斯坦喜马拉雅山的这类森林成为未来研究Cortinarius多样性的有希望的焦点。