Ustilago is a polyphyletic genus of smut fungi found mainly on Poaceae. The development of a taxonomy that reflects phylogeny requires subdivision of Ustilago into smaller monophyletic genera. Several separate systematic analyses have determined that Macalpinomyces mackinlayi, M. tubiformis, Tolyposporella pachycarpa, Ustilago bouriquetii and U. maydis, occupy a unique phylogenetic position within the Ustilaginaceae. A previously introduced monotypic generic name typified by U. maydis, Mycosarcoma, is available to accommodate these species, which resolves one component of polyphyly for Ustilagos.lat. in Ustilaginaceae. An emended description of Mycosarcoma is provided to reflect the morphological synapomorphies of this monophyletic group. A specimen of Ustilago maydis that has had its genome sequenced is designated as a neotype for this species. Taxonomic stability will further be provided by a forthcoming proposal to conserve the name Uredo maydis over Lycoperdon zeae, which has priority by date, in order to preserve the well-known epithet maydis.

中文翻译：

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霉菌肉瘤（Ustilaginaceae），是玉米黑穗病（Ustilago maydis）及其近亲与肥大的管状索里的复活通用名。

Ustilago是黑穗病真菌的多系属，主要发现于禾本科。反映系统发育的分类学的发展需要将乌斯梯亚戈（Ustilago）细分为更小的单系属。几个单独的系统分析已确定，Macalpinomyces mackinlayi，M.tubiformis，Tolyposporella pachycarpa，Ustilago bouriquetii和U. maydis在伞形科内占据着独特的系统发育位置。以前引入的以梅迪亚氏菌为代表的单型通用名是Mycosarcoma，可以容纳这些物种，从而为Ustilagos.lat解析了多重物种的一个组成部分。在伞形科。提供了对肉瘤的改良描述，以反映该单系统群体的形态突触。基因组已测序的马齿Us的标本被指定为该物种的新种。