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A novel strain, designated MRN461T, was isolated from a marine sponge in Micronesia. The 16S rRNA gene sequence of the isolate showed 95.6 % similarity with that of ‘Microscilla furvescens’ IFO (now NBRC) 15994. Phylogenetic analysis revealed that the isolate and ‘Microscilla furvescens’ IFO 15994 formed a distinct phyletic line within the family ‘Flexibacteraceae’. Cells of strain MRN461T were Gram-negative, long filamentous rods, motile by gliding. Growth was observed at 15–40 °C (optimum, 33 °C), at pH 5.0–9.5 (optimum, pH 7.5) and in the presence of 0.5–7.0 % sea salts (optimum, 2.5 %). The major isoprenoid quinone was MK-7. The dominant fatty acids were summed feature 3 (comprising iso-C15 : 0 2-OH and/or C16 : 1 ω7c; 34.8 %), C16 : 1 ω5c (21.6 %) and iso-C16 : 1 (19.8 %). The DNA G+C content was 41.5 mol%. On the basis of evidence from our polyphasic taxonomic study, strain MRN461T is classified within a novel genus and species in the family ‘Flexibacteraceae’, for which the name Marinoscillum pacificum gen. nov., sp. nov. is proposed. The type strain of Marinoscillum pacificum is strain MRN461T (=KCCM 42325T =JCM 14064T). The misclassified species ‘[Microscilla] furvescens’ is transferred to the new genus as Marinoscillum furvescens (ex Lewin 1969) nom. rev., comb. nov., with LMG 13023T (=DSM 4134T =ATCC 23129T =NBRC 15994T) as the type strain.
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International Journal of Systematic and Evolutionary Microbiology vol. 59 , part 5, pp. 1204 - 1208
Supplementary Table S1. Differential characteristics of strain MRN 461 Tand '[ Microscilla ] furvescens ' LMG 13023. [PDF](33 KB)