root › Viruses › Monodnaviria › Shotokuvirae › Cossaviricota › Papovaviricetes › Zurhausenvirales › unclassified Zurhausenvirales › Papillomaviridae › Firstpapillomavirinae › Dyoiotapapillomavirus › Dyoiotapapillomavirus 2 › Equus caballus papillomavirus 4