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 Methylococcales Bowman 2005 Family Methylococcaceaeᵀ Whittenbury and Krieg 1984 Genus Methylomonas (ex Leadbetter 1974) Whittenbury and Krieg 1984 Methylomonas methanicaᵀ (ex Söhngen 1906) Whittenbury and Krieg 1984