Methanothrix soehngenii Huser et al. 1983 Judicial Commision of the International Committee on Systematics of Prokaryotes. Rejection of the genus name Methanothrix with the species Methanothrix soehngenii Huser et al. 1983 and transfer of Methanothrix thermophila Kamagata et al. 1992 to the genus Methanosaeta as Methanosaeta thermophila comb. nov. Opinion 75. 2008 58 7 1753 1754 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.2008/005355-0 18599729 Kamagata Y. Kawasaki H. Oyaizu H. Nakamura K. Mikami E. Endo G. Koga Y. Yamasato K. Characterization of three thermophilic strains of Methanothrix (Methanosaeta) thermophila sp. nov. and rejection of Methanothrix (Methanosaeta) thermoacetophila. 1992 42 3 463 468 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-42-3-463 1380291 S42880 (segment 1) S42668 (segment 2) S42673 (segment 3) Although the GenBank record uses the heterotypic syn for NR_028242, the strain is type for Methanothrix soehngenii. According to Judicial Opinion 75 this strain is not in pure culture. 16S fragments S42668, S42673 and S42880 have been replaced by AH003991.