THREE NEW SPECIES OF THE GENUS STREPTOMYCES: STREPTOMYCES COCHLEATUS SP. NOV., STREPTOMYCES PARACOCHLEATUS SP. NOV., AND STREPTOMYCES AZATICUS SP. NOV.

Abstract

Three actinomycete strains isolated from soil, ‘Streptomyces candidus subsp. azaticus’ IFO 13803^T (T=type strain) and ‘Nocardiopsis streptosporus’ IFO 14362^T were found to contain both LL- and meso-2, 6-diaminopimelic acid (A₂pm) in their cell wall peptidoglycans and supposed to belong to new members of Streptomyces, yielded by unification of the genus Kitasatosporia with the genus Streptomyces. Based on the phenetic and DNA-DNA hybridization studies, these strains were considered to belong to new species of the genus Streptomyces. We propose the names Streptomyces cochleatus sp. nov. for the species represented by the soil isolate M-5^T (=IFO 14768^T) and S. paracochleatus sp. nov. for the soil isolate M-13^T (=IFO 14769^T), and S. azaticus sp. Nov. for strain IFO 13803^T. ‘Nocardiopsis streptosporus’ IFO 14362^T and ‘Kitasatosporia brunnea’ IFO 14627^T were included in S. phosalacinea. ‘K. melanogena’ IFO 14327^T, ‘K. cystarginea’ IFO 14836^T and ‘K. kifunense’ IFO 15206^T were new species belonging to the genus Streptomyces. ‘K. clausa’ IFO 15240^T was supposed to belong to a maduromycete. ‘K. papulosa’ and ‘K. grisea’ are synonymous, and should be reclassified as a species belonging to the cluster consisting of original Streptomyces species.