Basidiomycota is one of the major phyla in the fungal tree of life. The outline of Basidiomycota provides essential taxonomic information for researchers and workers in mycology. In this study, we present a time-framed phylogenomic tree with 487 species of Basidiomycota from 127 families, 47 orders, 14 classes and four subphyla; we update the outline of Basidiomycota based on the phylogenomic relationships and the taxonomic studies since 2019; and we provide notes for each order and discuss the history, defining characteristics, evolution, justification of orders, problems, significance, and plates. Our phylogenomic analysis suggests that the subphyla diverged in a time range of 443–490 Myr (million years), classes in a time range of 312–412 Myr, and orders in a time range of 102–361 Myr. Families diverged in a time range of 50–289 Myr, 76–224 Myr, and 62–156 Myr in Agaricomycotina, Pucciniomycotina, and Ustilaginomycotina, respectively. Based on the phylogenomic relationships and divergence times, we propose a new suborder Mycenineae in Agaricales to accommodate Mycenaceae. In the current outline of Basidiomycota, there are four subphyla, 20 classes, 77 orders, 297 families, and 2134 genera accepted. When building a robust taxonomy of Basidiomycota in the genomic era, the generation of molecular phylogenetic data has become relatively easier. Finding phenotypical characters, especially those that can be applied for identification and classification, however, has become increasingly challenging.

担子菌门是真菌生命树中的主要门之一。担子菌门的概述为真菌学研究人员和工作者提供了重要的分类信息。在这项研究中，我们提出了一个时间框架的系统发育树，其中包含来自 127 个科、47 个目、14 个纲和 4 个亚门的 487 种担子菌门；根据2019年以来的系统发育关系和分类学研究，更新了担子菌纲的概要；我们为每个订单提供注释，并讨论其历史、定义特征、演变、订单的合理性、问题、意义和板块。我们的系统发育分析表明，亚门在 443-490 Myr（百万年）的时间范围内分化，类在 312-412 Myr 的时间范围内分化，目在 102-361 Myr 的时间范围内分化。伞形孢菌亚门、柄锈菌亚门和黑粉菌亚门的家族分化时间范围分别为 50–289 Myr、76–224 Myr 和 62–156 Myr。基于系统发育关系和分化时间，我们提出了伞菌目中的一个新亚目迈锡尼亚目以适应迈锡尼科。目前担子菌纲共分为4个亚门、20个纲、77个目、297个科、2134个属。在基因组时代建立强大的担子菌分类学时，分子系统发育数据的生成变得相对容易。然而，寻找表型特征，尤其是那些可用于识别和分类的表型特征，已变得越来越具有挑战性。