[viruses]
   Order Herpesvirales
     Family Herpesviridae
       Subfamily Gammaherpesvirinae
         Genus Percavirus
           1 Equid gammaherpesvirus 2ᵀ
           2 Equid gammaherpesvirus 5
           3 Felid gammaherpesvirus 1
           4 Mustelid gammaherpesvirus 1
           5 Phocid gammaherpesvirus 3
           6 Vespertilionid gammaherpesvirus 1