Propionigenium Schink and Pfennig 1983 Propionigenium modestum Schink and Pfennig 1983 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Fusobacteriota corrig. Garrity and Holt 2021 Fusobacteria (sic) Garrity and Holt 2021 non Fusobacteria Staley and Whitman 2012 Fusobacteria (sic) Staley and Whitman 2012 non Fusobacteria Garrity and Holt 2021 Fusobacteriia corrig. Staley and Whitman 2012 Fusobacteriales Staley and Whitman 2012 Fusobacteriaceae Staley and Whitman 2012 emend. Gupta and Sethi 2014 Propionigenium Schink and Pfennig 1983 Fusobacteriaceae Staley and Whitman 2012 emend. Gupta and Sethi 2014 Psychrilyobacter Zhao et al. 2009 Fusobacterium Knorr 1922 emend. Moore and Holdeman 1974 (Approved Lists 1980) Hypnocyclicus Roalkvam et al. 2015 Ilyobacter Stieb and Schink 1985 Cetobacterium Foster et al. 1996 emend. Finegold et al. 2003 Propionigenium maris Janssen and Liesack 1996 emend. Watson et al. 2000 Propionigenium modestum Schink and Pfennig 1983 Schink B. Pfennig N. Propionigenium modestum gen. nov. sp. nov., a new strictly anaerobic nonsporing bacterium growing on succinate 1982 133 209 216 Archives of Microbiology Arch Microbiol 0302-8933 1432-072X 10.1007/BF00415003 Janssen P.H. Liesack W. Succinate decarboxylation by Propionigenium maris sp. nov., a new anaerobic bacterium from an estuarine sediment 1995 164 29 35 Archives of Microbiology Arch Microbiol 0302-8933 1432-072X 10.1007/BF02568731 7646317