This species is known only from the type locality, the south fork of the Río Las Vueltas, on the south slope of Volcán Barva in Heredia Province, Costa Rica, at 2,100m asl.
Habitat and Ecology
It was found in lower montane rainforest and presumably breeds in water.
There is no information on its population status, as this species is known only from two specimens from the same locality (Federico Bolaños pers. comm.).
If this species has declined or disappeared, it would have happened in pristine habitat, and possible threats would therefore include chytridiomycosis, climate change and airborne pollution.
The original collecting locality is protected within the Parque Nacional Braulio Carrillo. Given the possible threat of chytridiomycosis this species should be monitored carefully.
This species was previously within the genus Hyla but has recently been moved to the new genus Isthmohyla (Faivovich et al. 2005). Additional specimens are needed to better determine the validity of this species (Federico Bolaños pers. comm.).
Bolaños, F. & Savage, J. 2008. Isthmohyla xanthosticta. In: IUCN 2014