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= endemic EX = extinct or assumed extinct

Genus
Geophis (Central American Earth Snakes) |
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Genus
Heterodon (North American Hognose Snakes) |
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Genus
Masticophis (North American Whip Snakes and Coachwhips) |
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Genus
Oxybelis (Neotropical Vine Snakes) |
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Genus
Pituophis (Bullsnakes, Pine Snakes and Gopher Snakes) |
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Genus
Sonora (North American Ground, Sand, and Shovel-nosed Snakes) |
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Genus
Storeria (North American Brown Snakes) |
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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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Family
Elapidae [part 1: terrestrial species] (Cobras, Mambas, etc.) |  |  |
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