Classification of Lee and Scanlon 2002

Or. Ophidia Latreille 1804 [snake]
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Or. Serpentes Linnaeus 1758 [snake]
Fm. †Pachyophiidae Nopcsa 1923
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G. †Pachyophis Nopcsa 1923
Subor. Ophidia Latreille 1804 [snake]
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G. †Haasiophis Tchernov et al. 2000
G. †Pachyrhachis Haas 1979
Or. †Pythonomorpha Cope 1869
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G. †Adriosaurus Seeley 1881
G. †Aphanizocnemus Dal Sasso and Pinna 1997
G. †Mesoleptos Cornalia and Chiozza 1852