Hyloxalus fuliginosus is a species of frog in the family Dendrobatidae. It may be endemic to Ecuador where it is known from the Amazonian slopes of the Andes in the northern Ecuador, with some sources reporting it from Colombia and Venezuela. Description Males measure about and females in snout–vent length. Habitat and conservation Its natural habitats are cloud forests where it occurs near streams. It is threatened by habitat loss. References fuliginosus Amphibians of Ecuador Taxa named by Marcos Jiménez de la Espada Amphibians described in 1871 Taxonomy articles created by Polbot