A novel Gram-stain positive, aerobic, non-motile actinobacterium, designated strain YC537(T), was isolated from lake sediment collected from Yenicaga Lake, Bolu, Turkey, and subjected to a polyphasic taxonomic approach. The organism had phylogenetic, chemotaxonomic, cultural and morphological properties consistent with its classification in the genusStreptomyces. 16S rRNA gene sequence analysis of strain YC537(T)showed that it is closely related to the type strain ofStreptomyces ziwulingensisF22(T)(97.9% sequence similarity),Streptomyces tauricusJCM 4837( T)(97.7%) andStreptomyces beijiangensisNBRC 100044( T)(97.6%). The cell wall of the strain containedLL-diaminopimelic acid and the cell-wall sugars were glucose, galactose and ribose. The major phospholipids of strain YC537(T)were diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylinositol. The predominant menaquinones were identified as MK-9(H-6) and MK-9(H-8). The major cellular fatty acids wereiso-C-16:0,iso-C-14:0,anteiso-C(15:0)andiso-C-15:0. Consequently, strain YC537(T)is considered to represent a novel species in the genusStreptomyces, for which the nameStreptomyces boluensissp. nov. is proposed. The type strain is YC537(T)(= KCTC 39750( T) = DSM 102303( T)).