Abstract
Summary 13 actinomycetes species were studied by chemotaxonomy and numerical taxonomy in an attempt to resolve their, until now, doubtful taxonomical classification. The strains were distinguished into two taxa which differed in their cell wall composition, menaquinone, phospholipid, and fatty acid patterns. Two of them could be associated to the genus Nocardiopsis and 11 clustered together with Saccharothrix australiensis, the type species of this genus. Five strains belonging to this cluster have already been described as members of the genus Nocardiopsis (Nocardiopsis coeruleofusca, Nocardiopsis flava, Nocardiopsis longispora, Nocardiopsis mutabilis, and Nocardiopsis syringae). However, our studies showed that they should be transferred to the genus Saccharothrix. The 11 members of the genus Saccharothrix can be divided into 8 different species on the basis of their physiology: Saccharothrix australiensis, Saccharothrix aerocolonigenes, Saccharothrix coeruleofusca (comb. nov.), Saccharothrix flava (comb. nov.), Saccharothrix longispora (comb. nov.), Saccharothrix mutabilis (comb, nov.), Saccharothrix mutabilis subsp. capreolus (subsp. nov., comb. nov.), and Saccharothrix syringae (comb. nov.).
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