Investigation of fatty acid and mycolic acid properties of certain members of the genera and indicated identical spectra for certain pairs of organisms. Binary 16S rDNA sequence homology for the pairs and and , and and ranged between 99.2 and 99.9% for each of these pairs of species. Corresponding DNA-DNA similarity values, obtained by the spectrophotometric method, were significantly higher than 70%. Because certain chemotaxonomic properties and the majority of published phenotypic characters support the high degree of relatedness, we propose to transfer to . The transfer of to , and the transfer of to (M. Goodfellow, p. 1472–1481, P. H. A. Sneath et al., ed., , vol. 2, 1986) is confirmed.


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