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A new species belonging to the Hyla pinorum group is described from the extremely wet forest of the northwestern portion of the Sierra de los Cuchumatanes of Guatemala. This species is the largest member of the pinorum group and, in addition to its size, is distinguished from other members of the group by characteristics of coloration and proportion. Hyla melanomma bivocata of southern Mexico is most similar to this new species. The existence of the pinorum group (H. melanomma) is confirmed for the first time from the Atlantic versant of northern Oaxaca, Mexico.
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Campbell et al. (1992) studied this question.
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