Ombrana sikimensis
Habitat
Hides in clusters under rocks in shallow streams, at 1,000-2,000m
Range
Central and eastern Nepal and north-eastern India (Sikkim, West Bengal, Meghalaya); possibly Bhutan
The Sikkim stream frog, Ombrana sikimensis, is the only species in its genus, a dicroglossid frog described by Jerdon in 1870, and the validity of its genus is uncertain. It lives at 1,000 to 2,000m in central and eastern Nepal and north-eastern India (Sikkim, West Bengal and Meghalaya), and may occur in Bhutan (Wikipedia, general species account).
It hides in clusters under rocks in shallow streams. The source gives no size, appearance or breeding detail (Wikipedia, general species account).