Leiosaurus is a genus of lizards in the family Leiosauridae.

The genus is endemic to South America.

[2] The genus Leiosaurus contains the following species which are recognized as being valid:[2] Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Leiosaurus.

The specific name, bellii, is in honor of English zoologist Thomas Bell, and the specific name, paronae, is in honor of Italian zoologist Corrado Parona.

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