root › Viruses › Monodnaviria › Shotokuvirae › Cossaviricota › Papovaviricetes › Zurhausenvirales › unclassified Zurhausenvirales › Papillomaviridae › Firstpapillomavirinae › Zetapapillomavirus › Zetapapillomavirus 1 › Equus caballus papillomavirus 1