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] Domain Bacteria Woese et al. 2024 Phylum "Candidatus Cryosericota" Martinez et al. 2023, incertae sedis [monotypic] Class "Candidatus Cryosericia"ᵀ Martinez et al. 2021 [monotypic] Order "Candidatus Cryosericales"ᵀ Martinez et al. 2021 [monotypic] Family "Candidatus Cryosericaceae"ᵀ Martinez et al. 2021 [monotypic] 1 Genus "Candidatus Cryosericum"ᵀ Martinez et al. 2021