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 "Methanopyri" Garrity and Holt 2001 nom. inval. [monotypic]] see Class Methanopyri Garrity and Holt 2002 [Order "Methanopyrales"ᵀ Huber and Stetter 2001 nom. inval. [monotypic]] see Order Methanopyrales Huber and Stetter 2002 1 [Family "Methanopyraceae"ᵀ Huber and Stetter 2001 nom. inval. [monotypic]] see Family Methanopyraceae Huber and Stetter 2002