the root (no rank)
Bacteria (domain)
Firmicutes (phylum)
Bacilli (class)
Bacillales (order)
Listeria (genus)
[hide inferior taxa]
Listeria innocua (species)
Listeria ivanovii (species)
Listeria monocytogenes (species)
Listeria seeligeri (species)
Listeria welshimeri (species)