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 Picornavirales
                 Family Picornaviridaeᵀ
                   Genus Parechovirus
                     1 Parechovirus D
                     2.1.1 Parechovirus C
                     2.1.2 Parechovirus B
                     2.1.2.0 [Ljungan virus]
                     2.2 Parechovirus Aᵀ
                     2.2.0 [Human parechovirusᵀ]