This species is known only from the type locality and the nearby vicinity, at elevations between 900 and 1,100m asl, in Paso Portachuelo, near Estación Biológica de Rancho Grande, Parque Nacional Henri Pittier, Aragua State, Venezuela.
Habitat and Ecology
It inhabits cloud forest. Breeding habits are unknown, although it probably lays eggs on the forest floor and adults carry tadpoles to the stream where they develop further, like other species of the genus.
It has not been recorded since its discovery 50 years ago, and so it might have declined and possibly even disappeared. In the last 10 years, searches for the species have been unsuccessful. This is one of the largest species of the genus, occurring in one of the best-studied places in Venezuela, and so it is of great concern that no further populations or specimens of this frog have been discovered.
Threats to this species are unknown, but chytridiomycosis cannot be ruled out as a threat.
The range of this species includes Parque Nacional Henri Pittier. Additional surveys are required to establish whether or not this species is still extant, particularly since there is still suitable habitat in its natural range.
Enrique La Marca, Jesús Manzanilla 2004. Mannophryne neblina. In: IUCN 2014