This is a moderately large species of Hyloxalus; snout–vent length in males measures up to 25.0 mm, in females to 29.2 mm. The discs on the fingers and toes are expanded, half again the width of the penultimate phalange; Finger I is longer than Finger II, and Finger III is not swollen in males. Lateral fringes are present on the fingers and toes. An outer tarsal fold and tarsal tubercle are absent; the inner tarsal fold is curved and distinct on the distal half of the tarsus. Webbing is absent between the toes. Dorsolateral stripes, oblique lateral stripes, and ventrolateral stripes are absent. The dorsum is dull green with a faint bluish tint; bluish cream flecks are present on the flanks. The dorsal surfaces of the digital scutes are white, contrasting with bordering gray surfaces; the throat chest, and anterior part of belly are olive brown with cream spots, and the posterior part of the belly and ventral the surfaces of the thighs are dark yellow. The iris is brown with a cream ring around the pupil. A median lingual process is absent, and the testes are white.
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Peru
This species is known from two localities at elevations of 1980 and 2180 m along the road from Abra Pardo de Miguel to Moyobamba on the steep east slope of the northern part of the Cordillera Central in northern Peru. The frogs occur along small streams in cloud forest.
Duellman, W. E. (2004). ''Frogs of the genus Colostethus (Anura; Dendrobatidae) in the Andes of northern Peru.'' Scientific Papers of the Natural History Museum, University of Kansas, 35, 1-49.
Written by William E Duellman (duellman AT ku.edu), University of Kansas
First submitted 2004-12-10
Edited by Kellie Whittaker (2007-12-03)
Species Account Citation: AmphibiaWeb 2007 Hyloxalus aeruginosus <http://amphibiaweb.org/species/6355> University of California, Berkeley, CA, USA. Accessed Oct 20, 2017.
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Citation: AmphibiaWeb. 2017. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 20 Oct 2017.
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