the root (no rank)
Viruses (domain)
retroid viruses (subkingdom)
Retroviridae (family)
Orthoretrovirinae (subfamily)
Gammaretrovirus (genus)
mink cell focus-forming virus (species)
[hide inferior taxa]
Friend mink cell focus-forming virus (subspecies)
Rauscher mink cell focus-forming virus (subspecies)