This species is known from eastern Myanmar and northern, southern and western Thailand. It was originally recorded also from China but this population has now been described as a distinct species (B. platyparietus). Records from the Tay Nguyen plateau of south-central Viet Nam represent B. intermedia (Orlov et al., 2000). It is generally found in hilly to steep mountainous areas above 500m asl. It probably occurs more widely than current records suggest, especially in areas between known sites.
Habitat and Ecology
This species inhabits evergreen forests. Males have been observed calling from small mountain streams. They are a stream-breeding species, and the larvae develop in water.
No quantitative data are available, but anecdotal information indicates that the species is uncommon to rare even in the areas where it occurs (Taylor, 1962). When commissioned, collectors have had difficulty-finding animals.
An apparently strong tie to evergreen forest makes this species sensitive to forest degradation processes, including fires and logging. Its long larval stage requiring clear, clean streams adds a further sensitivity to drought and pollution.
Maintaining the protected areas in the northern and western mountains of Thailand, safeguarding these from further fire and encroachment impacts, and further developing the protected areas system of eastern Myanmar are recommended for this species.
What used to be recognized as Brachytarsophrys carinense in southern China is now identified as the distinct species B. platyparietus.
Peter Paul van Dijk, Annemarie Ohler 2004. Brachytarsophrys carinense. In: IUCN 2013