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