Kingdom [Animalia] Linnaeus, 1758 - animals
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   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
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     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
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       Subdivision Bilateralia
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         Phylum Chordata Bateson, 1885 - chordates
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           Subphylum Vertebrata Cuvier, 1812 - vertebrates
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             Class Mammalia Linnaeus, 1758 - mammals
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               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
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                 Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
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                   Suborder Mystacoceti (Flower, 1867) see Suborder Mysticeti Cope, 1891
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                     1 Family Balaenidae Gray, 1821 - right whales
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                     2 Family Eschrichtiidae Ellerman & Morrison-Scott, 1951 - gray whales
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                     3 Family Balaenopteridae Gray, 1864 - rorquals
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