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 Flavobacteriia Bernardet 2012
                   Order Flavobacteriales Bernardet 2012
                     Family Weeksellaceae García-López et al. 2020
                       01 Genus Algoriella Yang et al. 2016
                       02 Genus Apibacter Kwong and Moran 2016
                       03 Genus Bergeyella Vandamme et al. 1994 [monotypic]
                       04 Genus Chishuiella Zhang et al. 2014 [monotypic]
                       05 Genus Chryseobacterium Vandamme et al. 1994
                       06 Genus Cloacibacterium Allen et al. 2006
                       07 Genus Cruoricaptor Yassin et al. 2013 [monotypic]
                       08 Genus Elizabethkingia Kim et al. 2005
                       09 Genus Empedobacter (ex Prévot 1961) Vandamme et al. 1994
                       10 Genus Frigoriflavimonas Menes et al. 2022
                       11 Genus Marnyiella Zhao et al. 2023
                       12 Genus Moheibacter Zhang et al. 2014 [monotypic]
                       13 Genus Ornithobacterium Vandamme et al. 1994 [monotypic]
                       14 Genus Profundicola Romanenko et al. 2024
                       15 Genus Riemerella Segers et al. 1993
                       16 Genus Spongiimonas Yoon et al. 2014
                       17 Genus Weeksellaᵀ Holmes et al. 1987 [monotypic]
                       18 Genus "Wuhapuella" Sun et al. 2025 nom. inval.
                       19 Genus "Candidatus Onthonaster" Gilroy et al. 2022 nom. pro-inval.