[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain "Archaea" Woese et al. 1990 Phylum "Euryarchaeota" Garrity and Holt 2001 Class Methanobacteria Boone 2002 Order Methanobacteriales Balch and Wolfe 1981 Family Methanobacteriaceae Barker 1956 (Approved Lists 1980) Genus Methanosphaera Miller and Wolin 1985 1 Methanosphaera stadtmanae Miller and Wolin 1985 2 Methanosphaera cuniculi Biavati et al. 1990