A new species of Hyla (Anura : Hylidae) from the Sierra Mixes, Oaxaca, Mexico, with comments on ontogenetic variation in the tadpoles

We describe a new species of Hyla that differs from the similar-looking spe cies H. pentheter by reaching a larger size, having a smaller tympanum, mor e webbing on the feet, more extensive nuptial excrescences, and a different color pattern on the flanks. We tentatively place this new species in the phenetic assemblage commonly referred to as the H. bistincta group. We desc ribe and illustrate the tadpole and discuss ontogenetic variation among tad poles, with reference to existing information on tadpoles of other species from the H. bistincta group.