Strains WB 3.3-2, WB 3.2-61, WB 4.1-42 and WB 2.3-68 were isolated from the Westerhöfer Bach hard water rivulet, North Germany. The strains were Gram-staining-negative and catalase-, aminopeptidase- and oxidase-positive. The novel strains lacked flagella and only strain WB3.2-61 showed gliding motility. Isolates WB 3.2-61, WB 4.1-42 and WB 2.3-68 produced flexirubin pigments. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the novel strains showed <98.2 % similarity to the type strains of all recognized species of the genus . Strains WB 3.3-2 and WB 4.1-42 shared 96.3 % sequence similarity and were only distantly related to the type strains of all of the members of the genus . Strain WB 3.2-61 branched adjacent to DSM 15094 (98.0 %), while strain WB 2.3-68 was a neighbour of DSM 3660 (97.1 %). On R2A medium, iso-C was the common major fatty acid; fatty acids C, C, iso-C 3-OH, iso-C 9, iso-C 3-OH and summed feature 3 (comprising C 7 and/or iso-C 2-OH) occurred in all strains though sometimes in low amounts. Metabolic properties revealed clear differences between the four isolates as well as between the isolates and their nearest phylogenetic neighbours. The lack of close relatedness was confirmed by Riboprinter and MALDI-TOF analyses of cell extracts. On the basis of a high number of phenotypic differentiating properties and phylogenetic uniqueness, four novel species are proposed with the following names: (type strain WB 3.3-2=DSM 21788=CIP 109865), (type strain WB 4.1-42=DSM 21790=CIP 109867), (type strain WB 2.3-68=DSM 21789=CIP 109868) and (type strain WB 3.2-61=DSM 21791=CIP 109866).


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vol. , part 10, pp. 2610 - 2617

Distance dendrogram of MALDI-TOF analysis of whole cells of type strains showing the position of the four isolates. [ PDF] 328 KB

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