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 Bacteroidota Krieg et al. 2021
                 Class Cytophagia Nakagawa 2012 [monotypic]
                   Order Cytophagalesᵀ Leadbetter 1974 (Approved Lists 1980)
                     Family Reichenbachiellaceae García-López et al. 2020
                       1 Genus Echidna corrig. Alain et al. 2010 nom. illeg.
                       2 Genus Marinoscillum Seo et al. 2009
                       3 Genus Reichenbachiellaᵀ Nedashkovskaya et al. 2005 [monotypic]