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]
           ?viruses
             [DNA and RNA reverse transcribing viruses]
               1 [RNA Reverse Transcribing Viruses]
               2 [DNA Reverse Transcribing Viruses]