A new species of Mallocybe is described and illustrated based on material collected near the vicinity of Pinus wallichiana in mixed conifer forests in district Abbottabad, Khyber Pakhtoonkhaw, Pakistan. Mallocybe velutina is recognized by the presence of moderate yellow to light yellow pileal margin with deep yellow or fulvous pileus center; strikingly velvety pileus surface; subdistant moderate yellow lamellae; subphaseoliform to ellipsoid basidiospores, clavate to cylindrical cheilocystidia and an ecological association with Pinaceae. The internal transcribed spacer region (ITS) and large subunit of the nuclear ribosomal RNA gene (nrLSU) were used for the delimitation of this species based on sequence data. The evolutionary relationships of M. velutina with other closely related species of Mallocybe were inferred by means of maximum likelihood and maximum parsimony of concatenated ITS + nrLSU dataset. Mallocybe velutina is most closely related to M. arenaria, M. heimii and M. tomentosula.

基于巴基斯坦开伯尔·帕克图汉（Khyber Pakhtoonkhaw）阿伯塔巴德（Abbottabad）地区针叶林混交林中，在松树壁松附近收集的材料，对一种新的马洛比（Mallocybe）物种进行了描述和说明。绒毛藻由中等黄色到浅黄色绒毛边缘和深黄色或有绒毛的绒毛中心而识别。柔软的绒毛表面；亚黄色中等薄层；亚相到椭圆形的孢子基孢子，棒状到圆柱状的囊藻，与松科的生态联系。根据序列数据，使用内部转录的间隔区（ITS）和核糖体RNA基因的大亚基（nrLSU）对该物种进行定界。的进化关系通过级联ITS + nrLSU数据集的最大似然和最大简约性推断出了M. velutina和其他紧密相关的Mallocybe物种。绒毛Mallocybe velutina与墨西哥沙雷氏菌（M. arenaria），海默氏菌（M. heimii）和毛霉（M. tomentosula）关系最密切。