Dendropsophus bilobatus sp. nov. from the Jaci-Parana River, a tributary of the east bank of the upper Madeira River, municipality of Porto Velho, Rondônia, Brazil, in life. A, B Holotype, INPA-H 41300, SVL = 18.8 mm, Jaci-Novo sampling site. C–E Adult male, INPA-H 41303, SVL = 19.9 mm, Jaci-Novo sampling site. F Adult male, INPA-H 41301, SVL = 18.9 mm, Jaci-Direito sampling site. Note the inflated translucent greenish bilobate vocal sac (A, C, D). Photographs: Albertina Pimentel Lima.