Chionaster nivalis is frequently detected in thawing snowpacks and glaciers. However, the taxonomic position of this species above the genus level remains unclear. We herein conducted molecular analyses of C. nivalis using the ribosomal RNA operon sequences obtained from more than 200 cells of this species isolated from a field-collected material. Our molecular phylogenetic analyses revealed that C. nivalis is a sister to Bartheletia paradoxa, which is an orphan basal lineage of Agaricomycotina. We also showed that C. nivalis sequences were contained in several previously examined meta-amplicon sequence datasets from snowpacks and glaciers in the Northern Hemisphere and Antarctica.

中文翻译：

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神秘的雪微生物 Chionaster nivalis 与 Bartheletia paradoxa (Agaricomycotina, Basidiomycota) 密切相关。

Chionaster nivalis 经常在解冻的积雪和冰川中被检测到。然而，该物种在属级以上的分类地位仍不清楚。我们在此使用从现场收集的材料中分离出的该物种的 200 多个细胞中获得的核糖体 RNA 操纵子序列对 C. nivalis 进行了分子分析。我们的分子系统发育分析显示 C. nivalis 是 Bartheletia paradoxa 的姐妹，Bartheletia paradoxa 是 Agaricomycotina 的孤儿基础谱系。我们还表明 C. nivalis 序列包含在来自北半球和南极洲的积雪和冰川的几个先前检查的宏扩增子序列数据集中。