A new species of agaricomycetes, Clitopilus lampangensis, is described based on collections from northern Thailand. This species was distinguished from previously described Clitopilus species by its pale yellow to grayish yellow pileus with the presence of wider caulocystidia. Molecular phylogenetic analyses, based on the data of the internal transcribed spacers (ITS) and the large subunit (LSU) of the nuclear ribosomal DNA, and the second largest subunit of RNA polymerase II (rbp2) genes, also support the finding that C. lampangensis is distinct from other species within the genus Clitopilus. A full description, color photographs, illustrations and a phylogenetic tree showing the position of C. lampangensis are provided.

中文翻译：

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Clitopiluslampangensis（Agaricales，Entolomataceae），从泰国北部的一个新种类。

根据泰国北部的收集物，描述了一种新的琼脂菌，Clitopiluslampangensis。该物种与先前描述的Clitopilus物种的区别在于其淡黄色至灰黄色绒毛，并存在较宽的caulocystidia。基于核糖体DNA内部转录间隔区（ITS）和大亚基（LSU）以及RNA聚合酶II（rbp2）基因第二大亚基的数据，分子系统发育分析也支持C的发现。 Lampangensis与Clitopilus属中的其他物种不同。提供了完整的描述，彩色照片，插图和系统树，显示了南美楠的位置。