Proposal of Streptomyces aureorectus ( ex Taig et al. 1969) Taig and Solovieva 1986 as a later heterotypic synonym of Streptomyces calvus Backus et al . 1957 (Approved Lists 1980) on the basis of a polyphasic taxonomic approach

As two separate genomic species, and were approved in 1980 and 1986, respectively. However, recently, it has been found that the average nucleotide identity and digital DNA-DNA hybridization values between JCM 4326 and DSM 41692 were 99.19 and 92.70 %, respectively, much higher than 95-96 and 70 % cut-off points proposed and the generally accepted species boundaries. These data indicated that they should be classified as the same genomic species. Furthermore, this result was also supported by a comprehensive comparison of phenotypic, chemotaxonomic and physio-biochemical characteristics between the two type strains. All these data indicated that and had the same taxonomic position. In accordance with the principle of priority, it is proposed that is a later heterotypic synonyms of .