Classification of Vidal and Hedges 2002
Or. Serpentes Linnaeus 1758 [snake]
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Infraor. Alethinophidia Nopcsa 1923
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Fm. Aniliidae Fitzinger 1826 [pipe snake]
Unr. †Henophidia
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Fm. Boidae Gray 1825 [boa]
Fm. Erycidae Bonaparte 1825 [sand boa]
Fm. Loxocemidae Cope 1861 [Mexican burrowing snake]
Fm. Pythonidae Fitzinger 1826 [python]
Invalid names: Bolyeriidae [empty], Calabariidae [empty], Xenopeltidae Bonaparte 1845 [empty]
Fm. Tropidophiidae Cope 1894 [dwarf boa]
Fm. Uropeltidae [shieldtail snake]
Invalid names: Cylindrophiidae Fitzinger 1843 [empty]
Infraor. Scolecophidia Duméril and Bibron 1844
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Fm. Anomalepididae
Fm. Leptotyphlopidae Stejneger 1892
Fm. Typhlopidae Bonaparte 1831 [blind snake]
Invalid names: Macrostomata Ritgen 1828 [invalid subgroup]