|
= endemic EX = extinct or assumed extinct

  |
| 
Liotyphlops ternetzii
Paraguayan Blind Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Melgarejo & Meneghel 1984
 |
  |
| 
Eunectes notaeus
Yellow Anaconda | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dirksen 2001
Dirksen 2002
Peters & Orejas-Miranda 1970
 |
  |
| 
Atractus reticulatus
Reticulated Spindle Snake | 
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Lombardo & Achaval-Coppes 2012
Carreira, Meneghel & Achaval 2004
Carreira, Meneghel & Achaval 2005
Passos, Fernandes, Bernils & Moura-Leite 2010
 |
Genus
Boiruna (Southern Snake Eaters) |
 |
 |
  |
| 
Boiruna maculata
South American Spotted Snake Eater | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
Zaher 1996
 |
  |
| 
Calamodontophis paucidens
Southern Forest Snake | 
Achaval & Olmos 2003
Carreira & Lombardo 2008
Carreira & Maneyro 2015
Carreira & Meneghel 2003
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Lombardo & Achaval-Coppes 2012
Carreira, Meneghel & Achaval 2005
Franco, Carvalho-Cintra & Lema 2006
Franco, Salomao, Borges-Martins, Di-Bernardo, Meneghel & Carreira 2001
 |
  |
| 
Chironius bicarinatus
Eastern Sipo | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dixon, Wiest & Cei 1993
Peters & Orejas-Miranda 1970
 |
Genus
Dipsas (South American Slug Eaters) |
 |
 |
  |
| 
Dipsas turgida
Bolivian Snail Eater | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
 |
  |
| 
Erythrolamprus almadensis
Almada Smooth Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
Peters & Orejas-Miranda 1970
Vanzolini 1986
 |
  |
| 
Erythrolamprus jaegeri
Southern Green Smooth Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dixon 1987b
Dixon 1989
Peters & Orejas-Miranda 1970
 |
  |
| 
Erythrolamprus poecilogyrus
Yellow-bellied Smooth Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dixon 1989
Giraudo & Scrocchi 2002
Peters & Orejas-Miranda 1970
 |
  |
| 
Erythrolamprus semiaureus
Golden Smooth Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dixon 1983d
Dixon 1989
Giraudo, Arzamendia & Cacciali 2006
 |
Genus
Helicops (South American Keelbacks) |
 |
 |
  |
| 
Helicops infrataeniatus
Surinam Keelback | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Filho & Aoki 2011
Giraudo & Scrocchi 2002
Peters & Orejas-Miranda 1970
 |
  |
| 
Leptophis ahaetulla
Common Green Parrot Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Meneghel & Achaval 1997
 |
Genus
Lygophis (South American Striped Ground Snakes) |
 |
 |
  |
| 
Lygophis anomalus
Yellow-striped Ground Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Dixon 1985
Dixon 1989
Panzera, Guerrero & Manayro 2017
Peters & Orejas-Miranda 1970
 |
  |
| 
Lygophis flavifrenatus
Yellow-lined Ground Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Lombardo 2007
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
 |
  |
| 
Oxyrhopus rhombifer
Rhombic Calico Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
 |
  |
| 
Paraphimophis rustica
Rusty Snake Eater | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
Zaher 1996
 |
Genus
Phalotris (South American Collared Snakes) |
 |
 |
  |
| 
Phalotris lemniscatus
Southern Black-sided White-collared Snake | 
Achaval & Olmos 2003
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Golay, Smith, Broadley, Dixon, McCarthy, Rage, Schätti & Toriba 1993
 |
Genus
Philodryas (South American Bush Racers & allies) |
 |
 |
  |
| 
Philodryas aestiva
Eastern Brazilian Green Bush Racer | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
Peters & Orejas-Miranda 1970
Thomas 1976b
 |
  |
| 
Philodryas agassizii
Burrowing Night Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
 |
  |
| 
Philodryas olfersii
Common Green Bush Racer | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Lombardo & Achaval-Coppes 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
 |
  |
| 
Philodryas patagoniensis
Patagonian Bush Racer | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Gouveia, Novelli, Vieira & Sousa 2017
Peters & Orejas-Miranda 1970
Thomas 1976b
 |
  |
| 
Psomophis obtusus
Red-bellied Ground Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
Myers & Cadle 1994
Peters & Orejas-Miranda 1970
Pietro, Nenda & Williams 2010
 |
  |
| 
Taeniophallus occipitalis
Bahia Leaf-litter Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Myers 1974
Peters & Orejas-Miranda 1970
 |
  |
| 
Taeniophallus poecilopogon
Uruguayan Leaf-litter Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Myers 1974
 |
Genus
Tantilla (American Centipede Snakes) |
 |
 |
  |
| 
Tantilla melanocephala
South American Black-headed Centipede Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
Wilson & Mata-Silva 2015
Wilson & Mena 1980
Wilson 1987
Wilson 1992
 |
  |
| 
Thamnodynastes hypoconia
Southern Mock Viper | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
 |
  |
| 
Thamnodynastes strigatus
Striped Mock Viper | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Di Pietro & Nenda 2007
 |
  |
| 
Tomodon dorsatus
Brazilian Pampas Snake | 
Carreira & Lombardo 2006
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Lombardo & Achaval-Coppes 2012
 |
  |
| 
Tomodon ocellatus
Ocellated Pampas Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Giraudo & Scrocchi 2002
Peters & Orejas-Miranda 1970
 |
Genus
Xenodon (Northern Mock Lanceheads & South American Hognose Snakes) |
 |
 |
  |
| 
Xenodon dorbignyi
Spotted Hognose Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Peters & Orejas-Miranda 1970
 |
  |
| 
Xenodon histricus
Rayed Hognose Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Orejas-Miranda 1971
Peters & Orejas-Miranda 1970
 |
  |
| 
Xenodon merremii
Toad-eating Mock Lancehead | 
Achaval & Olmos 2003
Carreira & Achaval 2007
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
 |
Family
Elapidae [part 1: terrestrial species] (Cobras, Mambas, etc.) |  |  |
  |
| 
Micrurus altirostris
Uruguayan Coral Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Campbell & Lamar 2004
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Lema 2002
Roze 1996
Silva & Sites 1999
 |
Genus
Epictia (Neotropical Thread Snakes) |
 |
 |
  |
| 
Epictia munoai
Rio Grande do Sul Thread Snake | 
Achaval & Olmos 2003
Achaval Elena 2001
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Francisco, Pinto & Fernandes 2012
Hahn 1980
McDiarmid, Campbell & Touré 1999
Peters & Orejas-Miranda 1970
Wallach 2016
 |
  |
| 
Bothrops alternatus
Urutu | 
Achaval & Olmos 2003
Achaval Elena 2001
Campbell & Lamar 2004
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
 |
  |
| 
Bothrops pubescens
Pampas Lancehead | 
Achaval & Olmos 2003
Achaval Elena 2001
Campbell & Lamar 2004
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Silva & Rodrigues 2008
 |
  |
| 
Crotalus durissus
South American Rattlesnake | 
Achaval & Olmos 2003
Achaval Elena 2001
Campbell & Lamar 2004
Carreira & Maneyro 2015
Carreira, Brazeiro, Camargo, Rosa, Canavero & Manyro 2012
Carreira, Meneghel & Achaval 2005
Prigioni, Borteiro, Kolenc, Colina & González 2013
 |
| |