Methanobacillus omelianskii Bryant et al. 1967 Methanobacillus omelianskii Bryant et al. 1967 Methanobacillus omelianskii Bryant et al. 1967 Methanobacillus omelianskii Bryant et al. 1967 This was a syntrophic culture that was later purified into M.o.H. (=DSM 863) and M.o.H.G. (=DSM 862), which serve as type material of Methanobacterium formicicum and Methanobacterium bryantii. Methanobacterium bryantii Balch and Wolfe 1981 Parker C.T. Tindall B.J. Garrity G.M. International Code of Nomenclature of Prokaryotes 2019 69 1A S1 S111 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.000778 26596770 Balch W.E. Fox G.E. Magrum L.J. Woese C.R. Wolfe R.S. Methanogens: reevaluation of a unique biological group. 1979 43 2 260 296 Microbiological Reviews Microbiol Rev 0146-0749 390357 Bryant M.P. Wolin E.A. Wolin M.J. Wolfe R.S. Methanobacillus omelianskii, a symbiotic association of two species of bacteria. 1967 59 1-3 20 31 Archiv für Mikrobiologie Arch Mikrobiol 0003-9276 10.1007/BF00406313 5602458 Reddy C.A. Bryant M.P. Wolin M.J. Characteristics of S organism isolated from Methanobacillus omelianskii. 1972 109 2 539 545 Journal of Bacteriology J Bacteriol 0021-9193 1098-5530 5058442 This name is illegitimate as it was based on a syntrophic culture from which the type strains of two species of Methanobacterium were isolated.