Classification of Osborn 1903
Cl. Reptilia Laurenti 1768 [reptile]
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Subcl. Diapsida Osborn 1903 [diapsid]
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Or. Crocodilia Owen 1842 [crocodilian]
Superor. Dinosauria Owen 1842 [dinosaur]
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Or. †Orthopoda Cope 1866
Or. Theropoda Marsh 1881 [theropod]
Invalid names: Cetiosauria Seeley 1874 [empty]
Or. †Ichthyosauria de Blainville 1835 [ichthyosaur]
Or. †Phytosauria Jaeger 1828
Or. †Pterosauria Kaup 1834 [pterosaur]
Superor. Squamata Oppel 1811 [squamates]
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Or. Lacertilia Owen 1842 [lizard]
Or. Ophidia Latreille 1804 [snake]
Invalid names: Mosasauria [empty]
Invalid names: Diaptosauria Osborn 1903 [empty]
Subcl. Synapsida Osborn 1903 [synapsid]
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Superor. †Anomodontia Owen 1859
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Or. Cynodontia Owen 1861 [cynodont]
Subor. †Dicynodontia Owen 1859 [dicynodont]
Or. †Gomphodontia Seeley 1895
Or. †Placodontia Cope 1871 [placodont]
Or. Theriodontia Owen 1876
Superor. †Sauropterygia Owen 1859
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Or. †Nothosauria Baur 1889 [nothosaur]
Or. †Plesiosauria de Blainville 1835 [plesiosaur]
Or. Testudinata Oppel 1811 [turtle]
Subor. Rhynchocephalia Günther 1867 [rhynchocephalian]
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Invalid names: Sauranodontidae Lortet 1892 [empty]