The asexual genera (1918) and (1927), including their sexual morphs in (1923), have a cosmopolitan distribution and are associated with foliar, fruit, leaf, stem and root diseases on a wide variety of hosts. Species of these genera sometimes occur as secondary invaders of plant tissues infected by other organisms or that are injured by other causes. Several studies published over the last few decades had conflicting ideas as to whether , and should be regarded as synonymous or as separate genera. The present study aims to resolve the generic classification of these genera through phylogenetic analyses of the concatenated alignment of partial LSU nrDNA, , ITS nrDNA and sequence data of 117 isolates, combined with their morphology. Results revealed that all strains cluster in a single well-supported clade. Conidial colour, traditionally the distinguishing character between and , evolved multiple times throughout the clade, and is not a good character at generic level in . The three genera should therefore be regarded as synonymous, with the older name having priority. Furthermore, this study delineated 13 new species, and new combinations were proposed for a further 15 species.
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