Methanocella sp. None 2015 Methanocella sp. None 2015 Universal Root Woese et al. 1990 Archaea Woese et al. 1990 Euryarchaeota (sic) Garrity and Holt 2001 Methanobacteriota corrig. Garrity and Holt 2001 Methanomicrobia Garrity et al. 2003 Methanocellales Sakai et al. 2008 Methanocellaceae Sakai et al. 2008 Methanocella Sakai et al. 2008 Methanocella sp. None 2015 Methanocella Sakai et al. 2008 Methanocella conradii Lü and Lu 2012 Methanocella arvoryzae Sakai et al. 2010 Methanocella paludicola Sakai et al. 2008 No reference is available 2015 No reference is available 2015