Distribution: Brazil (probably entire Amazonian region, Mato Grosso, Pernambuco, Alagoas, Goias, Mato Grosso do Sul [HR 32: 57]), French Guiana, Guyana, Venezuela (Amazonas, Aragua, Bolivar, Delta Amacuro, Nueva Estarte, Sucre), Isla Margarita, Trinidad, Tobago, Suriname, Bolivia (Santz Cruz), N Peru (Loreto)
Type locality: Ecgá, Brazil.
It was until recently confused with M. bistriata, many populations of which have since been reassigned to M. nigropunctata. It may also be considered a synonym with the closely related M. mabouya, which is found in the Caribbean. This taxonomy has undergone significant revision in recent years and remains unresolved.