Pleomorphochaeta caudata Arroua et al. 2017 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Spirochaetota corrig. Garrity and Holt 2021 Spirochaetes (sic) Garrity and Holt 2021 non Spirochaetes Cavalier-Smith 2002 Spirochaetia (Cavalier-Smith 2002) Paster 2020 Spirochaetales Buchanan 1917 (Approved Lists 1980) emend. Hördt et al. 2020 Sphaerochaetaceae Hördt et al. 2020 non Sphaerochaetaceae Bidzhieva et al. 2020 Pleomorphochaeta Arroua et al. 2017 Pleomorphochaeta caudata Arroua et al. 2017 Pleomorphochaeta Arroua et al. 2017 Pleomorphochaeta multiformis (Miyazaki et al. 2014) Arroua et al. 2017 Pleomorphochaeta naphthae Arroua et al. 2018 Pleomorphochaeta caudata Arroua et al. 2017 Arroua B. Ranchou-Peyruse A. Ranchou-Peyruse M. Magot M. Urios L. Grimaud R. 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 new genus and emended description of the genus Sphaerochaeta 2017 67 2 417 424 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001641 27902274 Arroua B. Ranchou-Peyruse A. Ranchou-Peyruse M. Magot M. Urios L. Grimaud R. 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 new genus and emended description of the genus Sphaerochaeta 2017 67 2 417 424 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001641 27902274