Methanogenium frittonii Harris et al. 1996 Spring S. Schumann P. Spröer C. Methanogenium frittonii Harris et al. 1996 is a later synonym of Methanoculleus thermophilus (Rivard and Smith 1982) Maestrojuán et al. 1990. 2005 55 3 1097 1099 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63607-0 15879239 List Editor Validation List no. 57. Validation of the publication of new names and new combinations previously effectively published outside the IJSB. 1996 46 2 625 626 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-46-2-625 8934914