Bothrops marmoratus, also known as the marbled lancehead, is a species of snake in the family Viperidae.

[1] The specific epithet of this species is a reference to the fact that this species pigmentation looks marbled.

[2] The holotype for the species was an adult female collected in Ipameri in Brazil.

[1] It belongs to the Bothrops neuwidi species group.

[3] The species is known to inhabit only the state of Goiás in Brazil.