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A yellow-pigmented bacterial strain, designated RIB1-20T, isolated from fresh water was investigated by means of a polyphasic taxonomic approach. The cells were Gram-negative, rod-shaped and non-spore-forming. Phylogenetic analyses with the 16S rRNA gene sequence showed that the strain formed a monophyletic branch towards the periphery of the evolutionary radiation occupied by the genus Luteimonas, its two closest neighbours being Luteimonas composti CC-YY255T (96.1 % sequence similarity) and Luteimonas mephitis B1953/27.1T (95.8 %). Strain RIB1-20T was clearly distinguished from both of those type strains using phylogenetic analysis, DNA–DNA hybridization, fatty acid composition data and a range of physiological and biochemical characteristics. It is evident from the genotypic and phenotypic data that strain RIB1-20T represents a novel species of the genus Luteimonas, for which the name Luteimonas aquatica sp. nov. is proposed. The type strain is RIB1-20T (=BCRC 17731T =LMG 24212T).
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International Journal of Systematic and Evolutionary Microbiology vol. 58 , part 9, pp. 2051 - 2055