Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Clade neomura Cavalier-Smith, 1987 Domain Archaea Woese et al. 2024 [paraphyletic] Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024 Phylum "Candidatus Hydrothermarchaeota" Jungbluth et al. 2023 [monotypic] Class "Candidatus Hydrothermarchaeia"ᵀ Chuvochina et al. 2019 nom. pro-inval. [monotypic] Order "Candidatus Hydrothermarchaeales"ᵀ Chuvochina et al. 2023, nom. pro-inval. [monotypic] Family "Candidatus Hydrothermarchaeaceae"ᵀ Chuvochina et al. 2023 nom. pro-inval. [monotypic] 1 Genus "Candidatus Hydrothermarchaeum"ᵀ Chuvochina et al. 2021