mustelid gammaherpesvirus 1 mustelid gammaherpesvirus 1 mustelid gammaherpesvirus 1 (mushv-1) is a species of virus in the genus percavirus, subfamily gammaherpesvirinae, family herpesviridae, and order herpesvirales. mustelid gammaherpesvirus 1 virus classification (unranked): virus realm: duplodnaviria kingdom: heunggongvirae phylum: peploviricota class: herviviricetes order: herpesvirales family: herpesviridae genus: percavirus species: mustelid gammaherpesvirus 1