Hyloxalus exasperatus is a species of frog in the family Dendrobatidae. It is endemic to Ecuador and found on the eastern slopes of the Andes in Pastaza and Morona-Santiago Provinces. However, it is suggested that specimens from Pastaza represent a different, possibly undescribed species. Description Males measure and females in snout–vent length (based on only six and two specimens, respectively). Toe webbing is absent but it has a dorsolateral stripe and a short oblique lateral stripe. It is similar to Hyloxalus whymperi but lacks heavy darkening on the abdomen of males. Male call is unknown. Habitat and conservation Its natural habitats are pluvial premontane and very humid premontane forests. Its altitudinal range is asl. It is threatened by habitat loss and degradation caused by agricultural expansion and logging; introduced species might also be a threat. References exasperatus Amphibians of the Andes Amphibians of Ecuador Endemic fauna of Ecuador Amphibians described in 1988 Taxa named by William Edward Duellman Taxa named by John Douglas Lynch Taxonomy articles created by Polbot