equid alphaherpesvirus 8 equid alphaherpesvirus 8 equid alphaherpesvirus 8 is a species of virus in the genus varicellovirus, subfamily alphaherpesvirinae, family herpesviridae, and order herpesvirales. equid alphaherpesvirus 8 virus classification (unranked): virus realm: duplodnaviria kingdom: heunggongvirae phylum: peploviricota class: herviviricetes order: herpesvirales family: herpesviridae genus: varicellovirus species: equid alphaherpesvirus 8