The following is a list of Streptomyces species, organized alphabetically by species name. Names that have not been validated according to the Bacteriological Code are enclosed in "quotes". As of June 2021, there are 679 valid species of Streptomyces and an additional 121 provisional species. New species continue to be discovered (e.g., S. gossypiisoli, described in 2021). Many species are named after their colorful hyphae and/or spores.