Osteocephalus cannatellai Ron, Venegas, Toral, Read, Ortiz & Manzano 2012

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.

The adult male measures 38.5-57.2 mm in snout-vent length and the adult female 62.6-72.8 mm. The skin of the dorsum is dark green in color with light brown or dark brown marks. The ventrum is gray or cream in color with lighter spots. There is a light mark underneath each eye. The flanks are light green in color with darker marks. The bones are green in color. The iris of the eye is bronze in color with dark reticulations. Some frogs have bright blue pigmentation near the groin and on the legs.

This frog lives near streams with rocky bottoms. It has been observed to perch on leaves and branches 0.5 to 2.3 meters above the forest floor.

Scientists named this frog after David C. Cannatella, who studied the frogs of South America and taught many others.

Osteocephalus cannatellai​ es una especie de anfibio anuro de la familia Hylidae.

Osteocephalus cannatellai est une espèce d'amphibiens de la famille des Hylidae.

Adult male, 52.85 mm SVL, head length 18.61, head width 18.53, eye diameter 5.08, tympanum diameter 3.31, femur length 25.84, tibia length 30.05, foot length 22.73. Head narrower than body, slightly longer than wide; snout truncate in lateral and dorsal views; distance from nostril to eye longer than diameter of eye; canthus rostralis distinct and rounded; loreal region concave; internarial area depressed; nostrils moderately protuberant, directed laterally; interorbital area flat, lateral margins of the frontoparietals inconspicuous through skin; eye large, strongly protuberant; tympanic membrane clearly evident, large, slightly wider than high, about two thirds of eye diameter, separated from eye by ca. 85% of its diameter; tympanic annulus distinct except dorsally where it is covered by supratympanic fold; posterior end of supratympanic fold reaches arm insertion. Arm slender, axillary membrane present, reaching one third of arm length; four small low tubercles present along ventrolateral edge of forearm; relative length of fingers I

Osteocephalus cannatellaihas been recorded at twelve localities, all of them south of the Napo river, in the Ecuadorian and Peruvian Amazon basin (Provincias Morona Santiago, Napo, Orellana, Pastaza, Zamora-Chinchipe, and Datem del Marañón; Fig. 2). Localities with known elevation (El Edén, Huino, Yachana, Zanjarajuno, Río Maderoyacu, Hola Vida, Bobonaza, Nuevo Israel, Yawi, and Kampankis) have a range between 200 and 1290 m above sea level. Maximum airline distance between localities is 531 km. Osteocephalus cannatellai occurssympatrically with Osteocephalus buckleyi at Reserva Yachana and with Osteocephalus fuscifacies and Osteocephalus mutabor at Río Pucayacu, Nuevo Israel and Hola Vida. Most specimens were collected at Río Pucayacu, a river surrounded by a mixture of primary and secondary forest. Frogs were found next to the river, perching over broad leaves or on tree branches 50 to 230 cm above the ground. At the collection site, the river has an average width of approximately 10 m, fast running water, and a rocky bottom. Males were calling next to the river between June 26 and July 3 2010. Several adults and a juvenile were found on a small stream, tributary of Río Rivadeneira, surrounded by secondary forest, near Río Pucayacu, in March 2008. Vegetation types (according to the classification of Sierra et al. 1999 ) are: (1) Amazonian Mountain Range Evergreen Foothill Forest, characterized by a mixture of Amazonian and Andean vegetation with a canopy of 30 m (Río Pucayacu, Bobonaza, and Yawi), (2) Amazonian Lowland Evergreen Forests, characterized by high plant alpha-diversity and a canopy of 30 m with emergent trees that reach 40 m (Huino, Río Maderoyacu, Reserva Yachana), and (3) Amazonian Lower Montane Evergreen Forest, with an elevational range of 1300 to 2000 m above sea level, its canopy can reach 25 to 30 m (Nuevo Israel; Sierra et al. 1999, Cerón et al. 1999). Specimens from Peru were collected in Cordillera de Kampankis within an elevational range of 300 to 365 m above sea level in tall, closed-canopy forest on low hills with well-drained soils at the base of the mountains. The soils have variable proportions of silt, clay and sand, but there are some small patches of sandy soil and limestone outcrops. The forest canopy is about 30 m tall, with emergent trees reaching 45 m. All individuals were collected in riparian vegetation of low-velocity and low-volume streams with rounded slate rocks lining the stream bed. Some individual were found on leafs of dense populations of rheophytic plants or shrubby Pitcairnia aphelandriflora (Bromeliaceae). Other individuals were found on branches of bushes between 50 and 200 cm above the ground. Other arboreal frogs at the site were Osteocephalus mutabor, Hypsiboas cinerascens, and Gastrotheca longipes.