This species is known only from the non-specific type locality of "in the forest at Mazaruni, British Guiana" (Goin 1966). The exact locality is unknown, so no map has been drawn for this assessment. The elevational range is unknown.
Habitat and Ecology
This species presumably inhabits lowland forest and breeds by larval development in water.
There is nothing known about the population status of this species, which is known only from one specimen. Its population trend is unknown.
The major threats to this species are unknown. However, the type locality is within an undisturbed isolated region of forest.
It is not known whether this species occurs in any protected areas.
More taxonomic research is desirable as the type specimen might prove to be a juvenile of another species. Further research on its population status, life history and ecology is also required.
Red List Status
Data Deficient (DD)
Listed as Data Deficient in view of continuing uncertainties as to its extent of occurrence, population status and ecological requirements.
This species was previously within the genus Hyla but has recently been moved to the resurrected genus Dendropsophus (Faivovich et al. 2005).
IUCN SSC Amphibian Specialist Group 2018. Dendropsophus grandisonae. The IUCN Red List of Threatened Species 2018: e.T55493A120315670. .Downloaded on 19 November 2018