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]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Infrakingdom Opizoa Cavalier-Smith, 2021 [paraphyletic]
                 Genus Pseudaphelidium Schweikert & Schnepf, 1996 [monotypic]
                   1 Pseudaphelidium drebesiiᵀ Schweikert & Schnepf, 1996