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
                         1 Methylomonas aurantiaca Bowman et al. 1990
                         2 Methylomonas fodinarum Bowman et al. 1990
                         3 Methylomonas koyamae Ogiso et al. 2012
                         4 Methylomonas lenta Hoefman et al. 2014
                         5 Methylomonas methanicaᵀ (ex Söhngen 1906) Whittenbury and Krieg 1984
                         6 Methylomonas paludis Danilova et al. 2013
                         7 Methylomonas scandinavica Kalyuzhnaya et al. 2000