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
             Family Iridoviridae
               Subfamily Alphairidovirinae
                 Genus Megalocytivirus
                   1 Infectious spleen and kidney necrosis virusᵀ
                   2 Scale drop disease virus