[Taxonomic observations on Streptoverticillium griseocarneum]

A strain of Streptoverticillium (IA-7527) which produces an antibiotic complex formed at least by two substances--one active against fungi and another active against bacteria--has been identified as Stv. griseocarneum. The methods and the results of the International Streptomyces Project were used. By comparing the results obtained, i.e., the description of the sample IA-7527, with ISP standard descriptions of the related species, and attributing percentual values of similarity to each corresponding item, the overall similarity between the strains compared was obtained. The main result of the study is the conclusion that the ISP descriptions of STV. EHIMENSE, Stv. kentuckense, Stv. mashuense, Stv. parvisporogenes, Stv. takataense and Stv. griseocarneum are so similar, that the cited species--and the strain ISP-5464, IMRU 3631, labeled Stv. rubireticuli--should be considered as synonyms of Stv. griseocarneum, the first species described in the group.