Streptimonospora salina gen. nov., sp nov., a new member of the family Nocardiopsaceae

Actinomycete strain YIM 90002(T)(= CCTCC 99003(T) = CCRC 16284(T)) was isol ated from a soil sample collected from a salt lake in the west of China. Th e aerial mycelium of this organism is well developed but not fragmented and , at maturity. Terms snore chains or spores. Spores In short chains are ova l- to rod-shaped and have wrinkled surfaces. Substrate mycelium is branched with non-fragmenting hyphae and forms single oval to round spores borne on sporophores or dichotomously branching sporophores. Single spores have wri nkled surfaces. Single spores and spores in short chains are non-motile. St rain YIM 90002(T) contains meso-diaminopimelic acid, DD-diaminopimelic acid , glycine, lysine and aspartic acid in its cell wall and has glucose, galac tose, ribose, xylose, arabinose and mannose as whole-cell sugars (no diagno stic sugars). The phospholipids are phosphatidylglycerol, phosphatidylinosi tol and phosphatidylethanolamine. The major menaquinones are MK-S(H-6), MK- 10(H-2) and MK-10(H-4). Phylogenetic data indicate that this strain belongs to the family Nocardiopsaceae. The morphological and physiological charact eristics and chemotaxonomic and phylogenetic data for this strain differ fr om those of previously described actinomycetes. Therefore, a new genus, Str eptimonospora, is proposed for this organism; the type species of the genus is Streptimonospora saline gen. nov., sp. nov., and the type strain of S. salina is strain YIM 90002(T).