Reclassification of Streptomyces hygroscopicus strains as Streptomyces aldersoniae sp. nov., Streptomyces angustmyceticus sp. nov., comb. nov., Streptomyces ascomycinicus sp. nov., Streptomyces decoyicus sp. nov., comb. nov., Streptomyces milbemycinicus s

A polyphasic study was undertaken to determine the taxonomic status of six strains received asStreptomyces hygroscopicus. The strains had chemotaxonomic and morphological properties typical of members of the genusStreptomycesand formed distinct phyletic lines in theStreptomyces16S rRNA gene tree. These strains were distinguished from one another and from phylogenetically close neighbours using a combination of phenotypic properties. The combined genotypic and phenotypic data showed that all six strains form distinct centres of taxonomic variation within the genusStreptomyces. The following novel species are proposed to accommodate the strains:Streptomyces aldersoniaesp. nov. (type strain DSM 41909T=NRRL 18513T),Streptomyces angustmyceticussp. nov., comb. nov. (type strain DSM 41683T=NRRL B-2347T),Streptomyces ascomycinicussp. nov. (type strain DSM 40822T=NBRC 13981T),Streptomyces decoyicussp. nov., comb. nov. (type strain DSM 41427T=NRRL 2666T),Streptomyces milbemycinicussp. nov. (type strain DSM 41911T=NRRL 5739T) andStreptomyces wellingtoniaesp. nov. (type strain DSM 40632T=NRRL B-1503T).