Osteocephalus yasuni Ron & Pramuk, 1999

Size

Male Osteocephalus yasuni reach 44–56 mm (1.7–2.2 in) in snout–vent length, while females measure 43–62 mm (1.7–2.4 in) in the same measurement.

Dorsal Coloration

The species' dorsum is brown and marked with dark brown spots.

Ventral Coloration

Ventral coloration differs between sexes and adult males range from bright yellow to yellowish cream, while adult females have cream ventral coloration.

Skin Texture

Adult males have rough skin, and adult females have smooth skin.

Finger Structure

This species has expanded discs on its fingers.

Habitat

The natural habitats of Osteocephalus yasuni are tropical primary moist forests, including both non-flooded terra firme forests and seasonally flooded forests.

Breeding

The species breeds in temporary pools.

Activity Pattern

It is primarily nocturnal, but males can be heard calling during the daytime in certain months.

Local Threats

Locally, the species faces negative impacts from habitat loss.

Conservation Status

However, there are no major threats to this reasonably abundant and widespread species, and it is found within several protected areas, including its namesake Yasuni National Park.