Classification of Watson 1917
Or. †Thecodontia Owen 1859
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Fm. †Aetosauridae Baur 1887
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G. †Aetosaurus Fraas 1887
G. †Dyoplax Fraas 1867
G. †Notochampsa Broom 1904
G. †Stegomus Marsh 1896
Fm. †Ornithosuchidae Huene 1908
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G. †Euparkeria Broom 1913
G. †Ornithosuchus Newton 1894
G. †Scleromochlus Woodward 1907
G. †Sphenosuchus Haughton 1915
Fm. †Phytosauridae Jaeger 1828
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G. †Mesorhinus Jaekel 1910
G. †Mystriosuchus Fraas 1896
G. †Paleorhinus Williston 1904
G. †Phytosaurus Jaeger 1828
G. †Rhytidodon Emmons 1856
G. †Stagonolepis Agassiz 1844
Invalid names: Howesiidae Watson 1917 [empty]