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 Pseudomonadotaᵀ Garrity et al. 2021 Class Gammaproteobacteriaᵀ Garrity et al. 2005 Order Pseudomonadalesᵀ Orla-Jensen 1921 (Approved Lists 1980) [Family "Methanomonadaceae" Breed et al. 1957 nom. inval.] [Genus "Methanomonas"ᵀ Orla-Jensen 1909 nom. nud.]