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= endemic EX = extinct or assumed extinct

Genus
Boa (Red-tailed Boas) |
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Genus
Adelphicos (Central American Burrowing Snakes) |
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Genus
Clelia (Northern Snake Eaters) |
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Genus
Dipsas (Neotropical Snail Eaters) |
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Enuliophis sclateri
White-headed Snake | 
Koehler 1999
Koehler, Quintana, Buitrago & Diethert 2004
Peters & Orejas-Miranda 1970
Sunyer & Koehler 2010
Sunyer 2014
Sunyer, Fonseca, Fernandez, Olivas & Obando 2014
Travers, Townsend, Sunyer, Obando, Wilson & Nickerson 2011
Villa, Wilson & Johnson 1988
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Genus
Enulius (Middle American Long-tailed Snakes) |
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Genus
Geophis (Central American Earth Snakes) |
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Genus
Imantodes (American Blunt-headed Tree Snakes) |
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Genus
Masticophis (North American Whip Snakes and Coachwhips) |
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Genus
Ninia (Coffee Snakes) |
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Genus
Oxybelis (Neotropical Vine Snakes) |
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Genus
Sibon (Neotropical Snail Eaters) |
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Genus
Tantilla (American Centipede Snakes) |
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Genus
Thamnophis (North American Garter Snakes and Ribbon Snakes) |
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Genus
Xenodon (Northern Mock Lanceheads and South American Hognose Snakes) |
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Family
Elapidae [part 1: terrestrial species] (Cobras, Mambas, etc.) |  |  |
Family
Elapidae [part 2: marine species] (Sea Snakes) |  |  |
Genus
Epictia (Neotropical Thread Snakes) |
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Genus
Agkistrodon (American Copperheads, Cottonmouths, and Cantils) |
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