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= endemic EX = extinct or assumed extinct

Genus
Boa (Red-tailed Boas) |
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Genus
Boiruna (Southern Snake Eaters) |
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Genus
Clelia (Northern Snake Eaters) |
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Genus
Dibernardia (East South American Leaf-litter Snakes) |
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Genus
Dipsas (Neotropical Snail Eaters) |
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Dryophylax almae
Jararaca Mock Viper | 
Barbosa, Lima & Guedes 2020
Barreto Guedes 2010
Costa, Guedes & Bernils 2021
Fernandes Coelho, Souza, Weider, Machado Pereira & Barros Ribeiro 2013
Franco, Trevine, Montingelli & Zaher 2017
Guedes, Nogueira & Marques 2014
Hamdan & Lira-da-Silva 2012
Jorge & Freire 2011
Silva, Silva, Sena & Nascimento 2006 [as "cf. almae"]
Trevine, Caicedo-Portilla, Hoogmoed, Thomas, Franco, Montingelli, Osorno-Munoz & Zaher 2021
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Genus
Helicops (South American Keelbacks) |
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Helicops leopardinus
Leopard Keelback | 
Costa, Guedes & Bernils 2021
Guedes, Nogueira & Marques 2014
Moraes-da-Silva, Amaro, Sales Nunes, Rodrigues & Curcio 2021
Moraes-da-Silva, Amaro, Sales Nunes, Strussmann, Teixeira, Andrade, Sudre, Recoder, Rodrigues & Curcio 2019
Silva, Silva, Sena & Nascimento 2006
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Genus
Imantodes (American Blunt-headed Tree Snakes) |
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Genus
Oxybelis (Neotropical Vine Snakes) |
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Genus
Phimophis (South American Shovel-nosed Snakes) |
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Phimophis guerini
Argentine Shovel-nosed Snake | 
Costa, Guedes & Bernils 2021
Filho, Santana, Vieira, Alves, Montenegro & Freitas 2012
Marques, Tinoco, Browne-Ribeiro & Fazolato 2012
Silva Lisboa, Araujo-Neto, Soares Tiburcio & Silva 2011
Silva, Silva, Sena & Nascimento 2006
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Genus
Sibon (Neotropical Snail Eaters) |
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Siphlophis compressus
Red-headed Liana Snake | 
Abegg, Santos, Ortiz, Moraes & Freitas 2017
Costa, Guedes & Bernils 2021
Freitas, Franca, Graboski, Uhlig & Verissimo 2012
Guedes, Nunes, Prudente & Marques 2011
Silva, Silva, Sena & Nascimento 2006
Vilela, Lima, Goncalves & Skuk 2011
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Genus
Tantilla (American Centipede Snakes) |
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Thamnodynastes pallidus
Common South American Mock Viper | 
Costa, Guedes & Bernils 2021
Franco, Trevine, Montingelli & Zaher 2017
Guedes, Nogueira & Marques 2014
Trevine, Caicedo-Portilla, Hoogmoed, Thomas, Franco, Montingelli, Osorno-Munoz & Zaher 2021
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Genus
Xenodon (Northern Mock Lanceheads and South American Hognose Snakes) |
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Genus
Xenopholis (South American Flat-headed Snakes) |
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Family
Elapidae [part 1: terrestrial species] (Cobras, Mambas, etc.) |  |  |
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Micrurus carvalhoi
Brazilian Ribbon Coral Snake | 
Casais e Silva 1996 [as M. lemniscatus]
Castro, Oliveira, Gonzalez, Curcio & Feitosa 2017
Costa, Guedes & Bernils 2021
Pires, Silva, Feitosa, Prudente, Filho & Zaher 2014
Silva, Silva, Sena & Nascimento 2006 [as M. lemniscatus]
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Genus
Epictia (Neotropical Thread Snakes) |
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Bothrops erythromelas
Caatinga Lancehead | 
Campbell & Lamar 2004
Carrasco, Grazziotin, Farfan, Koch, Ochoa, Scrocchi, Leynaud & Chaparro 2019
Costa, Guedes & Bernils 2021
Guedes, Nogueira & Marques 2014
Hoge & Romano Hoge 1981
Vechio, Prates, Grazziotin, Graboski & Rodrigues 2021
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Bothrops muriciensis
Murici Lancehead | 
Campbell & Lamar 2004
Costa, Guedes & Bernils 2021
David, Dobiey & Vogel 2018
Ferrarezzi & Freire 2001
Freitas, Franca, Graboski, Uhlig & Verissimo 2012
Silva, Silva, Sena & Nascimento 2006
Vechio, Prates, Grazziotin, Graboski & Rodrigues 2021
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