%0 Journal Article %A Arroua, Boussad %A Ranchou-Peyruse, Anthony %A Ranchou-Peyruse, Magali %A Magot, Michel %A Urios, Laurent %A Grimaud, Régis %T Pleomorphochaeta caudata gen. nov., sp. nov., an anaerobic bacterium isolated from an offshore oil well, reclassification of Sphaerochaeta multiformis MO-SPC2T as Pleomorphochaeta multiformis MO-SPC2T comb. nov. as the type strain of this novel genus and emended description of the genus Sphaerochaeta %D 2017 %J International Journal of Systematic and Evolutionary Microbiology, %V 67 %N 2 %P 417-424 %@ 1466-5034 %R https://doi.org/10.1099/ijsem.0.001641 %K Pleomorphochaeta caudata %K Sphaerochaeta %K Spirochaetaceae %K Pleomorphochaeta %I Microbiology Society, %X A strictly anaerobic Gram-stain-negative bacterium, designated strain SEBR 4223T, was isolated from the production water of an offshore Congolese oil field. Cells were non-motile, pleomorphic and had spherical, annular or budding shapes, often exhibiting long stalks. Strain SEBR 4223T grew on a range of carbohydrates, optimally at 37 °C and pH 7, in a medium containing 40 g l−1 NaCl. Predominant fatty acids were C14 : 0, C14 : 0 DMA, C16 : 0 and C16 : 1ω7c and the major polar lipids were phosphoglycolipids, phospholipids, glycolipids and diphosphatidylglycerol. The G+C content of the DNA was 28.7 mol%. Phylogenetic analysis, based on the 16S rRNA gene sequence, showed that strain SEBR 4223T and Sphaerochaeta multiformis MO-SPC2T formed a cluster with similarity to other species of the genus Sphaerochaeta of of less than 86 %. On the basis of the phenotypic characteristics and taxonomic analyses, we propose a novel genus, Pleomorphochaeta gen. nov., to accommodate the novel species Pleomorphochaeta caudata sp. nov., with SEBR 4223T (=DSM 103077T=JCM 31 475T) as the type strain. We also propose the reclassification of Sphaerochaeta multiformis MO SPC2T as Pleomorphochaeta multiformis MO-SPC2T comb. nov., the type strain of this novel genus and emend description of the genus Sphaerochaeta . %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.001641