Cochranella siren Lynch & Duellman, 1973 Nymphargus siren (common name: Rio Coca Cochran frog) is a species of frog in the family Centrolenidae, formerly placed in Cochranella.

It is found in Colombia, Ecuador, and Peru.

[2] Its natural habitats are pre-montane forests near streams.

[1] Adult males of Nymphargus siren measure 20–22 mm (0.79–0.87 in) in snout–vent length.

Snout is truncate and dorsal skin is shagreen with spinules.