title: A new species of spiny-backed treefrog (Osteocephalus) from Central Amazonian Brazil (Amphibia: Anura: Hylidae).
abstract: A new species of treefrog of the genus Osteocephalus is described from the Rio Abacaxis, a southern tributary of the Amazonas in the state of Amazonas, Brazil. This member of the O. buckleyi group is characterized by green dorsal colouration with irregular blotches of various shades of brown, light venter with tan spots and bold dark markings on the posterior surfaces of the thighs. It can be distinguished from its closest relative, O. helenae from the same general area, by the lack of an axillary membrane, a few indistinct tubercles on the proximal segment of Finger IV and single ulnar tubercles.
authors.affiliation: Institute of Integrated Sciences, Department of Biology, University of Koblenz-Landau, Universitätsstr. 1, 56070 Koblenz, Germany.; Email: khjungfer@aol.com.
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Jungfer
authors.affiliation: Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Av. dos Estados, 5001, CEP 09210-971, Santo André, São Paulo, Brazil.; Email: vanessa.verdade@ufabc.edu.br.
authors.forename: Vanessa K
authors.initials: VK
authors.lastname: Verdade
authors.affiliation: División Herpetología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"-CONICET, Angel Gallardo 470, 1405 Buenos Aires, Argentina.; Email: julian@macn.gov.ar.
authors.forename: Julián
authors.initials: J
authors.lastname: Faivovich
authors.affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, CEP 05508-090, São Paulo, Brazil.; Email: mturodri@usp.br.
authors.forename: Miguel T
authors.initials: MT
authors.lastname: Rodrigues
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001001:Anura / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D049628:Body Size; D001938:Brazil; D017753:Ecosystem; D008297:Male; D009929:Organ Size