[viruses]
   Realm Riboviria
     Family Hypoviridae [monotypic]
       Genus Hypovirus
         1 Cryphonectria hypovirus 1ᵀ
         2 Cryphonectria hypovirus 2
         3 Cryphonectria hypovirus 3
         4 Cryphonectria hypovirus 4