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 Nidovirales
                 Suborder Mesnidovirineae
                   Family Mesoniviridae [monotypic]
                     Subfamily Hexponivirinae [monotypic]
                       Genus Alphamesonivirus
                         1.1.1 Subgenus Karsalivirus
                         1.1.2 Subgenus Namcalivirus [monotypic]
                         1.2.1.1.1.1 Subgenus Menolivirus [monotypic]
                         1.2.1.1.1.2 Subgenus Kadilivirus [monotypic]
                         1.2.1.1.2 Subgenus Ofalivirus
                         1.2.1.2 Subgenus Enselivirus [monotypic]
                         1.2.2 Subgenus Casualivirus [monotypic]
                         2 Subgenus Hanalivirus [monotypic]