f Actinomadura malachitica and Microtetraspora viridis Are Synonyms and Should Be Transferred as Actinomadura viridis comb. nov.

We compared strain SF2461, Microtetraspora viridis JCM 3112T (T = type strain), Microtetraspora viridis subsp. intermedia JCM 3113T, and Actinomadura malachitica JCM 3297T by using morphological, cultural, physiological, and chemotaxonomic characteristics, as well as deoxyribonucleic acid homology. All of our results indicated that these four strains belong to the same species and that they are far from the other type strains of Microtetraspora species. Therefore, we propose that Actinomadura malachitica is a synonym of Microtetraspora viridis and that Microtetraspora viridis should be transferred to the genus Actinomadura as Actinomadura viridis comb. nov., with strain JCM 3112 (= ATCC 27103) as the type strain.