Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Mammalia [classis]
Cetacea [ordo]
Ordo Cetacea contains the following taxa:
Balaenidae [familia]
Balaenopteridae [familia]
Basilosauridae [familia]
Delphinidae [familia]
Hyperoodontidae [familia]
Monodontidae [familia]
Phocoenidae [familia]
Physeteridae [familia]
Ziphiidae [familia]