Classification of Lewis and Vaughn 1965

Cl. Reptilia Laurenti 1768 [reptile]
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Subcl. Anapsida Williston 1917 [anapsid]
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Or. Cotylosauria Cope 1880
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Subor. †Captorhinomorpha Watson 1917
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Fm. †Captorhinidae Case 1911
Fm. †Limnoscelidae Williston 1911
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G. †Limnoscelops Lewis and Vaughn 1965
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Limnoscelops longifemur Lewis and Vaughn 1965
Subor. †Diadectomorpha Watson 1917
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Fm. †Diadectidae Cope 1880
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G. †Diadectes Cope 1878
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Diadectes sanmiguelensis Lewis and Vaughn 1965
Subor. †Seymouriamorpha Watson 1917
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Fm. †Seymouriidae Williston 1911
Subcl. Synapsida Osborn 1903 [synapsid]
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Or. †Pelycosauria Cope 1878 [pelycosaur]
Or. †Pelycosauria Cope 1878 [pelycosaur]
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Subor. †Edaphosauria Cope 1882
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Fm. †Nitosauridae Romer and Price 1940
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G. †Mycterosaurus Williston 1915
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Mycterosaurus smithae Lewis and Vaughn 1965
Subor. †Ophiacodontia Romer and Price 1940
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Fm. †Ophiacodontidae Nopsca 1923 [ophiacodont]
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G. †Ophiacodon Marsh 1878
Subor. †Sphenacodontia Romer and Price 1940
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Fm. †Sphenacodontidae Marsh 1878
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Subfm. †Haptodontinae Romer and Price 1940
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G. †Cutleria Lewis and Vaughn 1965
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Cutleria wilmarthi Lewis and Vaughn 1965