Classification of Wilcox et al. 2002

Unr. Serpentes Linnaeus 1758 [snake]
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Infraor. Alethinophidia Nopcsa 1923
Infraor. Scolecophidia Duméril and Bibron 1844
Unr. Alethinophidia Nopcsa 1923
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Unr. Macrostomata Ritgen 1828
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Superfm. Booidea Gray 1825
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Unr. Caenophidia Hoffstetter 1939
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Superfm. Colubroidea Oppel 1811
Invalid names: Ungaliophiidae Zaher 1994 [empty]
Fm. Tropidophiidae Cope 1894 [dwarf boa]