Classification of Rice 2009
Or. †Desmostylia Reinhart 1953 [desmostylian]
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Fm. †Desmostylidae Osborn 1905
Fm. †Paleoparadoxiidae Reinhart 1959
Superfm. Phocoidea Smirnov 1908
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Fm. †Desmatophocidae Hay 1930
Fm. Odobenidae Allen 1880 [walrus]
Fm. Otariidae Gray 1825 [eared seal]
Fm. Phocidae Gray 1821 [seal]
Invalid names: Enaliarctidae Tedford 1976 [empty]
Unr. Cetacea Brisson 1762 [whale]
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Superfm. Delphinoidea Flower 1865
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Fm. †Albireonidae Barnes 1984
Fm. †Kentriodontidae Slijper 1936
Fm. Monodontidae Gray 1821
Fm. †Odobenocetopsidae Muizon 1993
Fm. Phocoenidae Gray 1825 [porpoise]
Unr. Mysticeti Cope 1891
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Fm. †Aetiocetidae Emlong 1966
Superfm. Balaenoidea Flower 1865
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Fm. Balaenidae Gray 1821 [right whale]
Fm. Neobalaenidae Miller 1923 [pygmy right whale]
Superfm. †Balaenopteroidea Gray 1868
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Fm. Balaenopteridae Gray 1864 [rorqual]
Invalid names: Aglaocetidae Steeman 2007 [empty], Diorocetidae Steeman 2007 [empty], Pelocetidae Steeman 2007 [empty]
Superfm. Cetotherioidea Steeman 2007
Fm. †Kekenodontidae Mitchell 1989
Fm. †Llanocetidae Mitchell 1989
Fm. †Mammalodontidae Mitchell 1989
Invalid names: Eomysticetoidea Sanders and Barnes 2002 [empty], Janjucetidae Fitzgerald 2006 [empty]
Unr. Odontoceti Flower 1867 [toothed whale]
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Fm. †Agorophiidae Abel 1914
Superfm. †Eurhinodelphinoidea Muizon 1988
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Fm. Eoplatanistidae Muizon 1988
Fm. †Eurhinodelphinidae Abel 1901
Superfm. Physeteroidea Gray 1868
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Fm. Kogiidae Miller 1923 [pygmy sperm whale]
Fm. Physeteridae Gray 1821 [sperm whale]
Superfm. Platanistoidea Simpson 1945
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Fm. †Dalpiazinidae Muizon 1988
Fm. †Patriocetidae Abel 1914
Fm. Platanistidae Gray 1846
Fm. †Squalodelphinidae Dal Piaz 1917
Fm. †Squalodontidae Brandt 1873
Fm. †Waipatiidae Fordyce 1994
Invalid names: Prosqualodontidae Fordyce and de Muizon 2001 [empty]
Fm. Simocetidae Fordyce 2002
Fm. †Xenorophidae Uhen 2008
Invalid names: Lipotoidea de Muizon 1988 [empty]
Invalid names: Basilosauroidea Mitchell 1989 [empty], Protocetoidea Mitchell 1989 [empty], Remingtonocetoidea Mitchell 1989 [empty]
Or. Sirenia Illiger 1811 [sirenian]
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Fm. Dugongidae Gray 1821 [dugong]
Fm. †Prorastomidae Cope 1889
Fm. †Protosirenidae Sickenberg 1934
Fm. Trichechidae Gray 1821 [manatee]