A member of the Hylodes lateristrigatus group which contains small to moderate sized species characterized by slender bodies, smooth dorsums, and light dorsolateral stripes (Heyer 1982; Haddad and Pombal 1995) . This species, like other members of the genus, are found in the Atlantic forests of Brazil, usually near streams maintained by waterfalls. Hylodes heyeri, named in honor of Ron Heyer who has contributed a lot to the knowledge of anurans in Brazil, has a head longer than wide, snout round in dorsal view and acuminate-protruding in lateral view. Nostrils are slightly protuberant and directed laterally. There is a weak supratympanic fold which extends from the posterior edge of the eye to the groin. Arms are robust, thumbs with nuptial pads are without spines. Upper surfaces of finger discs have well-developed scutes. Dorsal skin texture is slightly rugose, posterior region of the body and flanks dorsally rugose; undersurfaces smooth. Rugose textures is also found near the vent and on the ventral surfaces of the thighs. In life, H. heyeri is dark brown dorsally, the upper surfaces of the forelimbs, tibia, and foot are brown with dark irregular spots. Upper surfaces of thigh and gorin are greenish brown with dark irregular spots. A brownish white line extends from the shoulder to the goirn, along with a whitish lateral stripe extending from tip of snout to the arm insertion. Throat is silver gray with a dark gray belly. Iris is copper colored. Not all individuals have the large tubercles on the upper surfaces of feet, toes, hands and fingers.
Adveritsement call information are as follows: given sporadically, at an air temperature of 21-23 celsius, call durations are 0.72-1.53 sec; 21-37 notes per call given at a rate of 23.4-29.9/sec; note duration .03-.04 sec; dominant frequency range of 3.7-4.3 kHz. See Haddad et al. (1996) fig. 3 for harmonic and call structure diagrams.
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Brazil
Only known from the type locality in the vicinity of Caverna do Diabo, Eldorado, State of Sao Paulo, southeastern Brazil. The habitat consisted of a stream near a waterfall with rocks and a cave, both from which males called.
Life History, Abundance, Activity, and Special Behaviors
Males were observed calling in November and January (wet season). Males are diurnal and call from hsaded places on rocks and in rock crevices of small-to medium sized streams (some even from caves)
Haddad, C. F. B., Pombal, J. P., Jr., and Bastos, R. P. (1996). ''New species of Hylodes from the Atlantic Forest of Brazil (Amphibia: Leptodactylidae).'' Copeia, 1996(4), 965-969.
Haddad, C. F. B., and Pombal, J. P., Jr. (1995). ''A new species of Hylodes from southeastern Brazil (Amphibia: Leptodactylidae).'' Herpetologica, 51, 279-286.
Heyer, W. R. (1982). ''Two new species of the frog genus Hylodes from Caparao, Minas Gerais, Brasil (Amphibia: Leptodactylidae).'' Proceedings of the Biological Society of Washington, 95, 377-385.
Originally submitted by: Raul E. Diaz (first posted 2004-06-04)
Edited by: Tate Tunstall (2004-08-18)
Species Account Citation: AmphibiaWeb 2004 Hylodes heyeri <https://amphibiaweb.org/species/3463> University of California, Berkeley, CA, USA. Accessed Dec 6, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 6 Dec 2023.
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