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 treefrog has been proposed for it.
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
Jumping (saltation) can be distinguished from running, galloping, and other gaits where the entire body is temporarily airborne by the relatively l...
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starts withBased on the type series of Osteocephalus germani, adult males measure about 41 mm (1.6 in) and adult females about 49–51 mm (1.9–2.0 in) in snout–vent length. The snout is truncate but may sometimes be rounded in females. The tympanum is visible but partly concealed dorsally. The fingers and the toes bear large discs and are webbed, the toes more heavily so. Dorsal skin bears tubercles in males but is smooth in females. Coloration is variable, ranging dorsally from brown with dark brown marks to light gray with dark brown marks; the ventrum is light cream and may have dark brown flecks. There is a cream-colored suborbital mark. Males have a paired vocal sac.
The region of the type locality of Osteocephalus helenae is lowland tropical rainforest. In Peru, this species (as Osteocephalus germani ) has been collected from primary and secondary lowland forests and from premontane forest at elevations up to 725 m (2,379 ft). All specimens were encountered by temporary pools, perching over broad leaves or on tree branches 1–2 m (3 ft 3 in – 6 ft 7 in) above the ground.
