Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           ?"viruses"
             Realm Riboviria
               Order Nidovirales
                 Suborder Tornidovirineae [monotypic]
                   Family Tobaniviridae
                     Subfamily Serpentovirinae
                       1.1.1 Genus Pregotovirus [monotypic]
                       1.1.2 Genus Tiruvirus [monotypic]
                       1.2 Genus Sectovirus [monotypic]
                       2 Genus Infratovirus [monotypic]