Osteocephalus exophthalmus Smith and Noonan, 2001, Rev. Biol. Tropical, 49: 349. Holotype: UG-CSBD HA-722; cranium of holotype UTA A 51620. Type locality: "ca 30 km SE Imbaimadai, Mazaruni-Potaro District, Guayana, ca. 585 m . . . 5° 37′ 30″ N, 60° 14′ 42″ W."
Big-eye Slender-legged Treefrog (Kok and Kalamandeen, 2008, Intr. Taxon. Amph. Kaieteur Natl. Park, 5: 182).
Known from three localities: (1) the type locality at about 585 m on the Tepui south of Imbaimadai, Guyana; (2) Kaiteur National Park, Guyana; (3) 6 km south of the Guardia Nacional check point, Sierra de Lema, Bolívar, Venezuela. Probably to be found in adjacent Brazil.
Kok and Kalamandeen, 2008, Intr. Taxon. Amph. Kaieteur Natl. Park, 5: 182-183, provided an account. Barrio-Amoros, Salerno, Rojas-Runjaic, and Noonan, 2010, Check List, 6: 463-464, provided a record for Bolívar Province,Venezuela and discussed the range.
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