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 Undinarchaeota" Dombrowski et al. 2023 [monotypic] Class "Candidatus Undinarchaeia"ᵀ Dombrowski et al. 2022 1 Order "Candidatus Naiadarchaeales" Dombrowski et al. 2022 [monotypic] 2 Order "Candidatus Undinarchaeales"ᵀ Dombrowski et al. 2022 [monotypic]