IUCN threat status:

Near Threatened (NT)

Comprehensive Description

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Description

Coloration is pale-green to pale-brown above, and bluish-green on the venter, with a creamy line on the edge of the upper eyelid, the supratympanic fold, and the canthus (Duellman 1970). This species can immediately be distinguished from other Middle American hylids by the presence of an oval-shaped mental gland on the chin. The iris is pale brown, bones appear greenish through the skin, and a yellow anal stripe runs transversely. The skin is smooth except for weak granulation on the ventral thighs and belly.

The head is flat on top, the snout appears acutely rounded in dorsal outline and bluntly rounded in lateral profile, and the canthus is angular. The tympanum is approximately half the size of the eye, and a dermal fold arches from the eye, over the tympanum, to a point above the arm's insertion. The fingers are 1/3 webbed and bear small discs, while the toes are about 4/5 webbed and also bear small discs. Adult male snout-vent length begins around 31.9 mm and reaches a maximum of 37.0 mm, whereas females range from 36.7 to 43.3 mm (all above descriptions based on Duellman 1970).

The tadpole is ovoid, with a relatively shallow dorsal fin that does not extend onto the body. A large, ventral mouth is present, completely bordered by two rows of oral papillae, with bluntly serrated beaks, and six upper and nine lower rows of teeth (with some variation). The spiracle is sinstral, at a point midlength and midline along the body, and the anal tube is dextral (all tadpole morphology from Duellman 1970).

The mating call has been described as a "series of short, high pitched, cricket-like chirps," where the notes are produced in rapid succession (Duellman 1970).

Hyla alvaradoi is synonymous with H. colymba; see Duellman (1970) for remarks.

A Spanish-language species account can be found at the website of Instituto Nacional de Biodiversidad (INBio).

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