Sphaerostephanos castaneus
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Sphaerostephanos castaneus faces severe pressure from deforestation and habitat conversion throughout its limited range in Southeast Asian tropical forests. The species' specialized requirements for humid, shaded understory conditions make it particularly vulnerable to forest fragmentation and edge effects. Agricultural expansion and logging activities have significantly reduced suitable habitat, while climate change threatens to alter the moisture regimes essential for this fern's survival.
Habitat
This fern species inhabits the humid understory of lowland and montane tropical rainforests, typically growing on forest floors and rocky substrates in deeply shaded conditions. It requires consistently moist environments with high humidity levels, often found along stream banks and in areas with reliable water sources.