Due to cryptic diversification, phenotypic plasticity and host associations, multilocus phylogenetic analyses have become the most important tool in accurately identifying and circumscribing species in the genus. However, the application of the genealogical concordance criterion has often been overlooked, ultimately leading to an exponential increase in novel spp. Due to the large number of species, many lineages remain poorly understood under the so-called species complexes. For this reason, a robust delimitation of the species boundaries in is still an ongoing challenge. Therefore, the present study aimed to resolve the species boundaries of the species complex (DASC) by implementing an integrative taxonomic approach. The Genealogical Phylogenetic Species Recognition (GCPSR) principle revealed incongruences between the individual gene genealogies. Moreover, the Poisson Tree Processes' (PTPs) coalescent-based species delimitation models identified three well-delimited subclades represented by the species , and . These results evidence that all species previously described in the subclade are conspecific, which is coherent with the morphological indistinctiveness observed and the absence of reproductive isolation and barriers to gene flow. Thus, 52 spp. are reduced to synonymy under . Recent population expansion and the possibility of incomplete lineage sorting suggested that the subclade may be considered as ongoing evolving lineages under active divergence and speciation. Hence, the genetic diversity and intraspecific variability of in the context of current global climate change and the role of as a pathogen on palm trees and other hosts are also discussed. This study illustrates that species in are highly overestimated, and highlights the relevance of applying an integrative taxonomic approach to accurately circumscribe the species boundaries in the genus .