Osteocephalus Fitzinger, 1843, Syst. Rept.: 30. Type species: Osteocephalus taurinus Fizinger, 1843, by original designation. Nomen nudum.
Osteocephalus Steindachner, 1862, Arch. Zool. Anat. Fisiol., Fasc. 1, 2: 77. Type species: Osteocephalus taurinus Steindachner, 1862, by subsequent designation of Kellogg, 1932, Bull. U.S. Natl. Mus., 160: 149.
Slender-legged Treefrogs (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 61).
Guianas, Amazon Basin, and upper Orinoco and Magdalena drainages in Venezuela and Colombia.
See Trueb and Duellman, 1971, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 1: 1-47, for a review of this genus. See comment under Tepuihyla. Ron and Pramuk, 1999, Herpetologica, 55: 435, noted at a least three species remain undescribed the upper Amazon basin in Ecuador and Peru and that Osteocephalus was likely paraphyletic with respect to some group of other casque-headed treefrogs. Jungfer and Hödl, 2002, Amphibia-Reptilia, 23: 21-46, named one of these species and provided much useful comparative information on members of the genus. Lynch, 2002, Rev. Acad. Colomb. Cienc. Exact. Fis. Nat., 26: 289-292, commented on the relationships of this taxon. In Lophiohylini of Faivovich, Haddad, Garcia, Frost, Campbell, and Wheeler, 2005, Bull. Am. Mus. Nat. Hist., 294: 107-108. Moravec, Aparicio, Guerrero-Reinhard, Calderón, Jungfer, and Gvoždík, 2009, Zootaxa, 2215: 37-54, provided a tree for exemplars of the species and noted a rather large number of likely misidentifications associated with GenBank sequences. MacCulloch and Lathrop, 2009, R. Ontario Mus. Contrib. Sci., 4: 14, reported a likely undescribed species from Mount Ayanganna, Guyana. Ron, Toral, Venegas, and Barnes, 2010, ZooKeys, 70: 67-92, provided a molecular tree for nine species. Ron, Venegas, Toral, Read, Ortiz, and Manzano, 2012, ZooKeys, 229: 1-52, provided a revision of the Osteocephalus buckleyi group and a tree based on molecular evidence.
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