Bothrops pirajai is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Brazil. There are no subspecies that are recognized as being valid.
Helicops infrataeniatus is a species of snake in the family Colubridae. It is endemic to South America, and can be found in Uruguay, Argentina, Paraguay, and southern Brazil.
Coronelaps is a genus of snake in the family Colubridae that contains the sole species Coronelaps lepidus. It is also known as the Minas Gerais snake or crowned burrowing snake.
The Brazilian burrowing snake is a snake endemic to Brazil. It is monotypic in the genus Gomesophis.
Ihering's snake is a snake endemic to Brazil. It is the only species in the monotypic genus Lioheterophis.
The fanged water snake is a genus of snake in the family Colubridae.
Atractus trihedrurus is a species of snake in the family Colubridae. In English the species goes by the common name southern ground snake.
Amnisiophis amoenus is a species of snake of the family Colubridae.
Helicops apiaka is a species of snake in the family Colubridae. It is endemic to Brazil, in the state of Mato Grosso.
Helicops gomesi, also known commonly as the São Paulo keelback and cobra d'água in Brazilian Portuguese, is a species of snake in the family Colubridae. The species is endemic to Brazil.
Helicops hagmanni, also known commonly as Hagmann's keelback, is a species of snake in the subfamily Dipsadinae of the family Colubridae. The species is native to the Amazon River basin in South America.
Helicops modestus, the olive keelback, is a species of snake in the family Colubridae. It is endemic to Brazil, and can be found in the states of São Paulo, Rio de Janeiro, Minas Gerais, Mato Grosso do Sul, Goiás, and the Federal District of Brasília.
Helicops tapajonicus is a species of snake in the family Colubridae. It is found in Brazil.
Helicops trivittatus, the equatorial keelback, is a species of snake in the family Colubridae. It is found in Brazil.
Lygophis paucidens, Hoge's ground snake, is a species of snake in the family Colubridae. The species is native to Brazil and Paraguay.
Mesotes rutilus, Prado's coastal house snake, is a species of snake in the family Colubridae. The species is endemic to Brazil.
Phalotris concolor is a species of snake in the family Colubridae. The species is endemic to Brazil, in the state of Minas Gerais.
Phalotris labiomaculatus is a species of snake in the family Colubridae. The species is endemic to Brazil.
Phalotris mertensi is a species of snake in the family Colubridae. The species is native to Brazil.
Micrurus pacaraimae, the Pacaraima coral snake, is a species of snake of the family Elapidae.
