the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amniota (no rank)
Mammalia (class)
Eutheria (superorder)
Cetacea (order)
Mysticeti (suborder)
Balaenopteridae (family)
Balaenoptera (genus)
Balaenoptera borealis (species)
sei whale (primary common name)
[show inferior taxa]