Classification of Mateus et al. 2012

G. †Prognathodon Dollo 1889
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Invalid names: Liodon Owen 1842 [nomen dubium]
Fm. †Protostegidae Cope 1873
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G. †Protostega Cope 1871
Fm. Cheloniidae Bonaparte 1832
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G. †Euclastes Cope 1870
Fm. †Mosasauridae Gervais 1852 [mosasaur]
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Subfm. †Mosasaurinae Gervais 1853
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Invalid names: Plotosaurini Russell 1967 [empty]
Unr. Eucryptodira Gaffney 1975
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Invalid names: Angolachelonia Mateus et al. 2009 [empty]
Unr. †Eusauropoda Upchurch 1995
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Unr. †Neosauropoda Bonaparte 1986
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Unr. †Somphospondyli Wilson and Sereno 1998
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G. †Angolatitan Mateus et al. 2011
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†Angolatitan adamastor Mateus et al. 2011
Fm. †Plioplatecarpidae Dollo 1884
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G. †Angolasaurus Antunes 1964
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†Angolasaurus bocagei Antunes 1964
Unr. †Sauropterygia Owen 1859
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Unr. †Plesiosauria de Blainville 1835 [plesiosaur]
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Superfm. †Plesiosauroidea Welles 1943
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Fm. †Elasmosauridae Cope 1869 [elasmosaur]
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G. †Tuarangisaurus Wiffen and Moisley 1986
Unr. †Halisaurinae Bardet et al. 2005
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G. †Halisaurus Marsh 1869
G. †Phosphorosaurus Dollo 1889