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" ["subviral agents"] ["satellites"] [Group satellite nucleic acids] [Type double-stranded satellite RNAs] [satellite of Trichomonas vaginalis T1 virus]