Osteocephalus is a genus of frogs, the slender-legged tree frogs, in the family Hylidae found in the Guianas, the Amazon Basin, Venezuela, Colombia, southeastern Brazil, and north-eastern Argentina. Males are warty, while females are smooth.
Osteocephalus helenae is a species of frog in the family Hylidae. It is widely distributed in the Amazon Basin and is known from the lowlands of Bolivia, Peru, Brazil, Colombia, Venezuela, Guyana, and French Guiana. The specific name helenae honors Helen Beulah Thompson Gaige, an American herpetologist. Common name Helena's [sic] treefrog has been proposed for it.
Hyloscirtus alytolylax, called the babbling stream frog, babbling torrenter, or tadapi tree frog in English, is a species of frog in the family Hylidae found in Colombia and Ecuador. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, and rivers. It is threatened by habitat loss. Scientists have observed it in Colombia between 500 and 2159 meters above sea level and in Ecuador between 400 and 2000 meters above sea level.
Linda's tree frog is a species of frog in the family Hylidae found in Colombia and Ecuador between 2000 and 2500 meters above sea level. Its natural habitats are subtropical or tropical moist montane forests, rivers, pastureland, rural gardens, and heavily degraded former forests. It is threatened by habitat loss.
The Rio Chingual Valley tree frog is a species of frog in the family Hylidae found in Colombia and Ecuador. Its natural habitats are subtropical or tropical moist montane forests, rivers, and heavily degraded former forests. Scientists have seen it between 1950 and 2700 meters above sea level.
The Papallacta tree frog is a species of frog in the family Hylidae found in Colombia and Ecuador. Its natural habitats are subtropical or tropical moist montane forests and rivers. Scientists have seen it between 1950 and 2660 meters above sea level in the Cordillera Oriental. It is threatened by habitat loss.
The Pilalo tree frog is a species of frog in the family Hylidae endemic to Ecuador. Its natural habitats are subtropical or tropical moist montane forests and rivers. It has been observed between 2300 and 2600 meters above sea level. It is threatened by habitat loss.
Osteocephalus buckleyi, also known as Buckley's slender-legged treefrog, is a species of frog in the family Hylidae. It is found along the periphery of the Amazon Basin in Bolivia, Peru, Ecuador, Colombia, northeastern Brazil, Venezuela, Guyana, Suriname, and French Guiana, and also in the Orinoco Delta in Venezuela. It is probably a species complex. Some sources treat Osteocephalus vilmae from Ecuador and Peru as a valid species.
Osteocephalus cabrerai is a species of frog in the family Hylidae. It is found in the Amazon Basin in Brazil (Manaus), northeastern Peru, Ecuador, Colombia, Guyana, and French Guiana, possibly wider. Some earlier records refer to Osteocephalus buckleyi.
Osteocephalus deridens is a species of frog in the family Hylidae. It is found in the Napo and Pastaza River drainages in eastern Ecuador and in the Loreto Region, northern Peru. The specific name deridens is derived from Latin deridere, meaning "make fun of someone". This alludes to the males calling from the treetops that sound "as if they are laughing at the collectors' vain attempts to reach them". Common name funny slender-legged treefrog has been coined for this species.
Osteocephalus fuscifacies is a species of frog in the family Hylidae endemic to Ecuador. It is known from the Napo River drainage at intermediate elevations. The specific name fuscifacies is derived from Latin fuscus (=tan) and facies (=face), in reference to the uniform tan-colored loreal region and the lack of a light subocular spot. Common name Napo slender-legged treefrog has been coined for this species.
The Manaus slender-legged tree frog is a species of frog in the family Hylidae found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, moist savanna, rivers, intermittent freshwater marshes, and canals and ditches. It is threatened by habitat loss. It is also reported to produce Bufotenin.
The Ecuador slender-legged tree frog is a species of frog in the family Hylidae found in Colombia and Ecuador. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, intermittent freshwater marshes, rural gardens, and heavily degraded former forests.
Osteocephalus yasuni is a species of frogs in the family Hylidae. It is found in the upper Amazon Basin in southern Colombia, Ecuador, and northeastern Peru at elevations of 70–250 m (230–820 ft) above sea level. The specific name yasuni refers to the Yasuni National Park where its type locality is.
Dryaderces is a small genus of frogs in the family Hylidae. Their known distribution is disjunct, with one species found in the upper Amazon Basin and lower Andean slopes between central Peru and Amazonian Bolivia, and another one in Pará, Brazil. Its sister taxon is Osteocephalus. No phenotypic synapomorphies defining the genus are known.
Trachycephalus quadrangulum, the Chocoan milk frog, is a species of frog in the family Hylidae. It is endemic to the Pacific slopes of the Andes in Ecuador and Peru. Scientists have seen it between 20 and 350 meters above sea level.
Alfaroi's tree frog is a frog in the family Hylidae. It is endemic to Brazil, Ecuador, and Colombia. Scientists think it may also live in Peru. Scientists have seen it between 176 and 350 meters above sea level.
Osteocephalus vilarsi is a frog in the family Hylidae endemic to the state of Amazonas in Brazil and the state of Amazonas in Venezuela. Scientists think it might also live in Colombia. This frog lives in white-sand forests.
Osteocephalus duellmani is a frog in the family Hylidae endemic to Ecuador. Scientists know it exclusively from its type locality in the Cordillera del Cóndor. It was located 1910 meters above sea level.
Osteocephalus cannatellai is a frog in the family Hylidae endemic to Ecuador and Colombia. Scientists have seen it between 200 and 1290 meters above sea level.
