Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Clade neomura Cavalier-Smith, 1987 Domain Archaea Woese et al. 1990 [paraphyletic] Phylum Euryarchaeota Garrity and Holt 2001 Class "Methanomicrobia" Order Methanosarcinales Boone et al. 2002 Family Methanosaetaceae Boone et al. 2002 nom. illeg. [monotypic] [Genus Methanosaetaᵀ Patel and Sprott 1990 nom. illeg.] see Genus Methanothrix Huser et al. 1983 ["Methanosaeta thermophila" (Kamagata et al., 1992) Boone & Kamagata, 1998] see Methanosaeta thermophila (Kamagata et al. 1992) Boone and Kamagata 1998