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 Betaproteobacteria Garrity et al. 2006
                   Order Burkholderialesᵀ Garrity et al. 2006
                     Family Sphaerotilaceae Liu et al. 2023
                       01 Genus Amphibiibacter Costa et al. 2025
                       02 Genus Aquabacterium Kalmbach et al. 1999
                       03 Genus Aquariibacter Cui et al. 2021
                       04 Genus Aquincola Lechner et al. 2007 [monotypic]
                       05 Genus Azohydromonas Xie and Yokota 2005
                       06 Genus Caldimonas Takeda et al. 2002
                       07 Genus Ideonella Malmqvist et al. 1994
                       08 Genus Inhella Song et al. 2009
                       09 Genus Leptothrix Kützing 1843 (Approved Lists 1980)
                       10 Genus Methylibium Nakatsu et al. 2006
                       11 Genus Piscinibacter Stackebrandt et al. 2009 [monotypic]
                       12 Genus Rivibacter Stackebrandt et al. 2009
                       13 Genus Roseateles Suyama et al. 1999
                       14 Genus Rubrivivax Willems et al. 1991
                       15 Genus Scleromatobacter Mieszkin et al. 2023
                       16 Genus Sphaerotilusᵀ Kützing 1833 (Approved Lists 1980) [monotypic]