Methanobacterium aggregans Kern et al. 2015 Kern T. Linge M. Rother M. Methanobacterium aggregans sp. nov., a hydrogenotrophic methanogenic archaeon isolated from an anaerobic digester 2015 65 6 1975 1980 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.000210 25807978