Streptomyces ciscaucasicus Sveshnikova et al. 1983 is a later subjective synonym of Streptomyces canus Heinemann et al. 1953 Kämpfer, Peter and Rückert, Christian and Blom, Jochen and Goesmann, Alexander and Wink, Joachim and Kalinowski, Jörn and Glaeser, Stefanie P.,, 68, 42-46 (2018), doi = https://doi.org/10.1099/ijsem.0.002418, publicationName = Microbiology Society, issn = 1466-5026, abstract= Streptomyces canus was described in 1953 and the name was listed in the Approved List of Bacterial Names in 1980. Three years later, Streptomyces ciscaucasicus was published and the name was subsequently validated in Validation List no. 22 in 1986. On the basis of genome comparison and multilocus sequence analysis of the type strains of Streptomyces canus and Streptomyces ciscaucasicus it can now be shown that these two species despite some phenotypic differences are subjective synonyms. In such a case Rule 24 of the Bacteriological Code applies, in which priority of names is determined by the date of the original publication. Hence, we propose that S. ciscaucasicus is a later subjective synonym of S. canus ., language=, type=