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 Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024 Phylum Spirochaetota Garrity and Holt 2021 1 Genus "Spirosymplokos" Guerrero et al. 1993 nom. inval., incertae sedis 2 Class Spirochaetiaᵀ Paster 2020