The genus Cladosporium (Cladosporiaceae, Dothideomycetes), which represents one of the largest genera of dematiaceous hyphomycetes, has been intensively investigated during the past decade. In the process, three major species complexes (C. cladosporioides, C. herbarum and C. sphaerospermum) were resolved based on morphology and DNA phylogeny, and a monographic revision of the genus (s. lat.) published reflecting the current taxonomic status quo. In the present study a further 19 new species are described based on phylogenetic characters (nuclear ribosomal RNA gene operon, including the internal transcribed spacer regions ITS1 and ITS2, as well as partial actin and translation elongation factor 1-α gene sequences) and morphological differences. For a selection of the species with ornamented conidia, scanning electron microscopic photos were prepared to illustrate the different types of surface ornamentation. Surprisingly, during this study Cladosporium ramotenellum was found to be a quite common saprobic species, being widely distributed and occurring on various substrates. Therefore, an emended species description is provided. Furthermore, the host range and distribution data for several previously described species are also expanded.

属枝孢（Cladosporiaceae，座囊菌纲），它代表暗色丝孢菌的最大的属之一，在过去十年中，已经深入研究。在此过程中，根据形态学和DNA系统发育，解析了三个主要物种复合体（C. cladosporioides，C。herbarum和C. sphaerospermum），并出版了该属（s。lat。）的专题修订，以反映当前的分类学现状。。在本研究中，根据系统发育特征（核糖体RNA基因操纵子，包括内部转录的间隔区ITS1和ITS2以及部分肌动蛋白和翻译延伸因子1-α基因序列）描述了另外19个新物种。为了选择带有装饰分生孢子的物种，准备了扫描电子显微镜照片以说明表面装饰的不同类型。出乎意料的是，在这项研究中，发现角叉景天是一种非常常见的腐生菌种，广泛分布并存在于各种基质上。因此，提供了改进的物种描述。此外，还扩展了几种先前描述的物种的寄主范围和分布数据。