Department of Biology, Clark University, Worcester, Massachusetts 01610.
Mycology Research Group, Faculty of Biological Sciences, Goethe University, 60438 Frankfurt am Main, Germany.
Mycologia. 2022 Mar-Apr;114(2):270-302. doi: 10.1080/00275514.2021.2018881. Epub 2022 Apr 8.
The Roseinae clade is a lineage of the genus primarily composed of species of subsect. . Species in this morphologically distinct clade possess a white to pale cream spore print, mild taste, positive reaction to sulfovanillin, and primordial hyphae with acid-resistant crystals in the pileipellis. Here, we present a morphological and phylogenetic assessment that distinguishes seven eastern North American species of the core Roseinae lineage and a new subsection, Russula subsection , to accommodate members of the Albida clade. We assign the previously described species , and to three species-level clades, and three other species, , and , are described as new. Comparative morphological analyses reveal differences in the conformation of terminal elements in the pileipellis, spore size, hymenial cystidia contents, and pigmentation on the stipe surface as key features to recognize species in the group. Based on the analysis of publicly available data, we recognize a potential total of nine temperate North American species within subsect. , in addition to four from Central America, two from Europe, and 14 from Asia.
罗斯亚族是牛肝菌属的一个谱系，主要由亚属的物种组成。这个形态独特的分支中的物种具有白色至淡奶油色的孢子印痕、温和的味道、对磺香草醛的阳性反应以及在菌褶中的原基菌丝带有耐酸晶体。在这里，我们提出了一种形态和系统发育评估，区分了核心罗斯亚族谱系的七个北美东部物种和一个新的亚组，即乳菇亚组，以容纳 Albida 分支的成员。我们将先前描述的物种 和 分配到三个种级别的分支中，另外三个物种 、 和 被描述为新种。比较形态分析揭示了菌褶中末端结构的构象、孢子大小、菌褶囊状体含量以及菌柄表面色素沉着的差异，这些是识别该组中物种的关键特征。基于对公开可用数据的分析，我们除了在中美洲有四个、在欧洲有两个、在亚洲有 14 个外，还在 亚属中识别出潜在的总共九个北温带北美物种。
