Hyla trux is a member of the Hyla taeniopus species group and is found in the cloud forests of the Sierra Madre del Sur, Guerrero, Mexico. The skin of the dorsum and the undersurfaces of arms, head and lower legs is smooth. Ventral skin of the body and thighs are granular. Head, body, limbs, and feet are dorsally pale brown with dark chocolate brown blotches of many different shapes found across many parts of the body. There are clusters of iridophores spread out unevenly over the body, head, and limbs. The iris is yellowish golden with black reticulations. The tympanum is a pale brown.The axillae and groin are pale blue. Vocal slits are absent, prevomerine teeth present. Fingers are one-half webbed, toes three-fourths webbed. Dorsally, the snout is long and slightly pointed with no rostral keel and is round when viewed from the side. The tympanum is small, distinct, and round with a strong supratympanic fold (which extends from posterior border of eye to above the insertion of the arm) covers the upper edge of the tympanum. Fingers are moderately long 1<4<2<3 and toes 1<2<5<3<4.
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Mexico
The type locality for Hyla trux is 11.4 km southwest of Puerto del Gallo, Guerrero, Mexico at an elevation of 1985 m. The frogs were found in a variety of areas, along cascading mountain streams flowing through cool, moist, oak-pine or (at lower elevations) bamboo-tree fern cloud forests near Cerro Teotepec, Guerrero, at leevations between 1760-2120 m (Adler and Dennis 1972).
Life History, Abundance, Activity, and Special Behaviors
Extensive nuptial excrescences on thumb, but also found along proximo-distal bordering of each finger in males. Webbing is hypertrophied between toes one and two in sexually mature males. Variation in snout shape is present, where large adult males have a pointed snout and immature males and females and more rounded.
Adler, K., and Dennis. D.M. (1972). ''New tree frogs of the genus Hyla from the cloud forests of western guerrero, Mexico.'' Occasional Papers of the Museum of Natural History, the University of Kansas, 7, 1-19.
Originally submitted by: Raul E. Diaz (first posted 2004-06-04)
Edited by: Tate Tunstall (2004-08-18)
Species Account Citation: AmphibiaWeb 2004 Charadrahyla trux <https://amphibiaweb.org/species/982> University of California, Berkeley, CA, USA. Accessed Jun 3, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 3 Jun 2023.
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