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Fossil collection records
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Classification of Reisz 1977
Subcl.
Diapsida
Osborn 1903 [diapsid]
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Or.
Eosuchia
Broom 1914
Subor.
Eosuchia
Broom 1914
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Fm. †
Petrolacosauridae
Peabody 1952
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G. †
Petrolacosaurus
Lane 1945
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†
Petrolacosaurus kansensis
Lane 1945