New gram-positive bacteria were isolated from 1-year-old sludge from a wastewater treatment plant. The isolates are coccoid to rod-shaped, nonmotile aerobes that form neither spores nor mycelia. They are characterized by a peptidoglycan with directly cross-linked -diaminopimelic acid (type A1-γ), by the presence of menaquinone MK-8(H). and by the lack of mycolic acids. The strains have complex fatty acid patterns with i-C and straight-chain saturated and unsaturated fatty acids as major components. The G+C content of the DNA is 70 mol%. The results of chemotaxonomic studies and a 16S ribosomal DNA sequence comparison support our proposal to assign these bacteria to a new genus, the genus gen. nov.; the type species is sp. nov, and the type strain of is strain HKI 83 (= DSM 11140).


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