Propionispira Schink et al. 1983 emend. Ueki et al. 2014 Propionispira arboris Schink et al. 1983 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Firmicutes (sic) Gibbons and Murray 2021 Bacillota corrig. Gibbons and Murray 2021 Firmacutes (sic) Gibbons and Murray 2021 Negativicutes Marchandin et al. 2010 Selenomonadales Marchandin et al. 2010 emend. Campbell et al. 2015 Selenomonadaceae Campbell et al. 2015 Propionispira Schink et al. 1983 emend. Ueki et al. 2014 Selenomonadaceae Campbell et al. 2015 Anaerovibrio Hungate 1966 (Approved Lists 1980) Centipeda Lai et al. 1983 Megamonas Shah and Collins 1983 Mitsuokella Shah and Collins 1983 Pectinatus Lee et al. 1978 (Approved Lists 1980) emend. Caldwell et al. 2013 Schwartzia van Gylswyk et al. 1997 Selenomonas von Prowazek 1913 emend. Bryant 1974 (Approved Lists 1980) Zymophilus Schleifer et al. 1990 Propionispira raffinosivorans (Schleifer et al. 1990) Ueki et al. 2014 Propionispira arcuata Ueki et al. 2014 Propionispira arboris Schink et al. 1983 Propionispira paucivorans (Schleifer et al. 1990) Ueki et al. 2014 Schink B. Thompson T.E. Zeikus J.G. Characterization of Propionospira arboris gen. nov. sp. nov., a nitrogen fixing anaerobe common to wetwoods of living trees. 1982 128 2771 2779 Journal of General Microbiology J Gen Microbiol 0022-1287 Ueki A. Watanabe M. Ohtaki Y. Kaku N. Ueki K. Description of Propionispira arcuata sp. nov., isolated from a methanogenic reactor of cattle waste, reclassification of Zymophilus raffinosivorans and Zymophilus paucivorans as Propionispira raffinosivorans comb. nov. and Propionispira paucivorans comb. nov., and emended description of the genus Propionispira 2014 64 10 3571 3577 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.063875-0 25061065 Campbell C. Adeolu M. Gupta R.S. Genome-based taxonomic framework for the class Negativicutes: division of the class Negativicutes into the orders Selenomonadales emend., Acidaminococcales ord. nov. and Veillonellales ord. nov. 2015 65 9 3203 3215 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.000347 25999592