the root (no rank)
Viruses (domain)
retroid viruses (subkingdom)
Retroviridae (family)
Orthoretrovirinae (subfamily)
Deltaretrovirus (genus)
human T-cell lymphotropic virus type 1 (species)
HTLV I (alias)
HTLV-1 (alias)
human T-lymphotropic virus 1 (alias)
[hide inferior taxa]
adult T-cell leukemia virus (subspecies)