We describe a new species of Hyla that differs from the similar-loohng species H. pentheter by reaching a larger size, ha\iing a smaller tympanum, more webbing on the feet, more extensive nuptial excrescences, and a different color pattern on the flanks. \Ve tentatively place this new species in the phenetic assemblage commonly referred to as the H. bistincta group. \Ve describe and illlistrate the tadpole and discuss ontogenetic variation among tadpoles, with reference to existing information on tadpoles of other species from the H. bistincta group.
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A new species of Hyla (Anura: Hylidae) from the Sierra Mixes, Oaxaca, Mexico, with comments on ontogenetic variation in the tadpoles