[viruses]
   01 Realm Riboviria
   02 Order Caudovirales
   03 Order Herpesvirales
   04 Order Ligamenvirales
   05 Order Ortervirales
   06 Family Adenoviridae
   07 Family Alphasatellitidae
   08 Family Ampullaviridae [monotypic]
   09 Family Anelloviridae
   10 Family Ascoviridae
   11 Family Asfarviridae [monotypic]
   12 Family Bacilladnaviridae
   13 Family Baculoviridae
   14 Family Bicaudaviridae [monotypic]
   15 Family Bidnaviridae [monotypic]
   16 Family Circoviridae
   17 Family Clavaviridae [monotypic]
   18 Family Corticoviridae [monotypic]
   19 Family Fuselloviridae
   20 Family Geminiviridae
   21 Family Genomoviridae
   22 Family Globuloviridae [monotypic]
   23 Family Guttaviridae
   24 Family Hepadnaviridae
   25 Family Hytrosaviridae
   26 Family Inoviridae
   27 Family Iridoviridae
   28 Family Lavidaviridae
   29 Family Marseilleviridae
   30 Family Microviridae
   31 Family Mimiviridae
   32 Family Nanoviridae
   33 Family Nimaviridae [monotypic]
   34 Family Nudiviridae
   35 Family Ovaliviridae [monotypic]
   36 Family Papillomaviridae
   37 Family Parvoviridae
   38 Family Phycodnaviridae
   39 Family Plasmaviridae [monotypic]
   40 Family Pleolipoviridae
   41 Family Polydnaviridae
   42 Family Polyomaviridae
   43 Family Portogloboviridae [monotypic]
   44 Family Poxviridae
   45 Family Smacoviridae
   46 Family Sphaerolipoviridae
   47 Family Spiraviridae [monotypic]
   48 Family Tectiviridae
   49 Family Tolecusatellitidae
   50 Family Tristromaviridae [monotypic]
   51 Family Turriviridae [monotypic]
   52 Genus Dinodnavirus [monotypic]
   53 Genus Rhizidiovirus [monotypic]
   54 Genus Salterprovirus [monotypic]