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 Nanobdellati Rinke et al. 2024 Phylum "Candidatus Micrarchaeota" Baker and Dick 2023 Class "Candidatus Micrarchaeia"ᵀ Vazquez-Campos et al. 2021 nom. pro-inval. Order "Candidatus Micrarchaeales"ᵀ Vazquez-Campos et al. 2021 nom. pro-inval. [monotypic] Family "Candidatus Micrarchaeaceae"ᵀ Vazquez-Campos et al. 2021 nom. pro-inval. Genus "Candidatus Micrarchaeum"ᵀ Baker et al. 2020