A new species of spiny-backed treefrog (Osteocephalus) from Central Amazonian Brazil (Amphibia: Anura: Hylidae) Author Jungfer, Karl-Heinz Author Verdade, Vanessa K. Author Faivovich, Julián Author Rodrigues, Miguel T. text Zootaxa 2016 4114 2 171 181 journal article 39018 10.11646/zootaxa.4114.2.6 5da22796-09ba-4d92-9877-6e1aa7367095 1175-5326 255624 B6EF32E1-641C-4349-BF8E-0CAABCEAC687 Osteocephalus helenae : BOLIVIA : Santa Cruz : Buena Vista: MZUSP 95529. BRAZIL : Acre : Catuaba (S10°04'00''; W63°37'00''): SMNS 14190-1, 17502, 17520. Amapá : Rio Maracá, boca Igarapé Camaipí: MZUSP 99990-99999; Seringal Boa Fortuna : MZUSP 74253. Amazonas : Reserva Adolpho Ducke: MZUSP 59516, 74253, 75648, 84581; Reserva INPA- WWF (Rio Preto): MZUSP 58055. Rondônia : Cachoeira de Nazaré, Rio Machado: MZUSP 63805. UHE Samuel: MZUSP 76921. GUYANA : Cuyuni-Mazaruni : Kartabo: AMNH H- 13492. Demerara-Mahaica : Marudi Creek: AMNH A- 46233. Essequibo : Shudikar-wau: AMNH A- 49252. Essequibo Islands-West Demerara : Dunoon: UMMZ 52681 ( holotype ). Potaro-Siparuni : Iwokrama Forest: MTD 48360-2; Magdalen's Creek, NW bank of Konawaruk River, ca. 40 km WSW Mabura Hill: AMNH A- 166220-4, 166229. VENEZUELA : Amazonas : SW sector of Cerro Yapacana: AMNH-A 100598 .