the root (no rank)
Viruses (domain)
retroid viruses (subkingdom)
Retroviridae (family)
Orthoretrovirinae (subfamily)
Deltaretrovirus (genus)
primate T-lymphotropic virus 3 (species)
[hide inferior taxa]
human T-lymphotropic virus 3 (subspecies)
simian T-lymphotropic virus 3 (subspecies)