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 Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Cyanobacteriota Oren et al. 2022
                 Class Vampirovibrionophyceae corrig. Strunecký and Mareš 2023
                   1 Order Vampirovibrionalesᵀ Chuvochina et al. 2024 [monotypic]
                   2 Order "Candidatus Caenarcanales" corrig. Soo et al. 2022 [monotypic]
                   3 Order "Candidatus Gastranaerophilales" Di Rienzi et al. 2020
                   4 Order "Candidatus Obscuribacterales" Soo et al. 2014 nom. pro-inval. [monotypic]