Madre Selva field station, Depto Loreto, Peru. January 11, 2011.
This species gets its name from their unique reproductive habits. The males come down out of the trees and dig a circular basin, in a low spot close to a stream. When the rains come, the males call to females from their basins, and defend them from other males. Eggs are deposited in the basins, and the tadpoles either develop in the basin, or in the stream. Formerly in Hypsiboas. The dark stripe running from the tympanum to the nostril, and the white toe discs, are useful diagnostics for this species.
My Flickr album for this species is here.