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"
             Family Corticoviridae [monotypic]
               [[unranked] "PM2 phage group"ᵀ] see Genus Corticovirus
                 ["phage PM2"ᵀ] see Pseudoalteromonas phage PM2