Reclassification of Streptomyces fulvissimus as a later heterotypic synonym of Streptomyces microflavus

We investigated the taxonomic relationships among Streptomyces fulvissimus, Streptomyces fulvorobeus and Streptomyces microflavus. These type strains shared the same 16S rRNA gene sequence. Digital DNA-DNA relatedness and average nucleotide identity analyses using whole genome sequences suggested that S. fulvissimus and S. microflavus belong to the same genomospecies, whereas S. fulvorobeus does not. In addition to previously reported phenotypic data, the presence of almost the same set of secondary metabolite-biosynthetic gene clusters for polyketides and nonribosomal peptides also supported the synonymy between S. fulvissimus and S. microflavus. Therefore, S. fulvissimus should be reclassified as a later heterotypic synonym of S. microflavus.