Colostethus fuliginosus (Jiménez de la Espada, 1871) Hyloxalus fuliginosus or the Quijos rocket frog is a species of frog in the family Dendrobatidae.

[1][3] The frog's small range includes one protected park: Parque Nacional Cayambe Coca.

[1] Scientists infer that this frog breeds through larval development in streams.

[1] The IUCN Red List classifies this frog as endangered due to its small range and ongoing threats.

Water pollution and habitat loss in the form of deforestation in favor of agriculture and cattle grazing are the principal threats.