Abstract：
Species of the ectomycorrhizal (ECM) family Cortinariaceae (Agaricales, Agaricomycetes, Basidiomycota) have long been considered impoverished or absent from lowland tropical rainforests. Several decades of collecting in forests dominated by ECM trees in South America\'s Guiana Shield is countering this view, with discovery of numerous Cortinariaceae species. To date, ~12 morphospecies of this family have been found in the central Pakaraima Mountains of Guyana. Here, we describe three of these as new species of Cortinarius and two as new species of Phlegmacium from forests dominated by the ECM tree genera Dicymbe (Fabaceae subfam. Detarioideae), Aldina (Fabaceae subfam. Papilionoideae), and Pakaraimaea (Cistaceae). Macromorphological, micromorphological, habitat, and DNA sequence data are provided for each new species.
摘要：
外生菌根（ECM）科Cortinariacae（Agaricales，蘑菇,担子菌）长期以来一直被认为是低地热带雨林中的贫困或缺席。在南美圭亚那盾牌的ECM树占主导地位的森林中，几十年的收集正在反驳这种观点，发现了许多山茱萸科物种。迄今为止,在圭亚那的Pakaraima山脉中部发现了该家族的约12种形态物种。这里,我们将其中三个描述为Cortinarius的新物种，两个描述为以ECM树属Dicymbe为主的森林中的Phlegmacium的新物种（Fabaceaesubfam。Detarioideae)，阿尔迪纳(豆科植物。Papilionoideae），和Pakaraimaea（Cistaceae）。宏观形态学,微观形态学,栖息地,并为每个新物种提供DNA序列数据。
