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 Methanosarcinaceaeᵀ Balch and Wolfe 1981 Genus Methanosarcinaᵀ Kluyver and van Niel 1936 (Approved Lists 1980) Methanosarcina baltica von Klein et al. 2002