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A New Frog of the Genus Ptychohyla (Hylidae) from the Sierra de Santa Cruz, Guatemala, and Description of a New Genus of Middle American Stream-Breeding Treefrogs

Jonathan A. Campbell and Eric N. Smith
Herpetologica
Vol. 48, No. 2 (Jun., 1992), pp. 153-167
Published by: Allen Press on behalf of the Herpetologists' League
Stable URL: http://www.jstor.org/stable/3892668
Page Count: 15
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A New Frog of the Genus Ptychohyla (Hylidae) from the Sierra de Santa Cruz, Guatemala, and Description of a New Genus of Middle American Stream-Breeding Treefrogs
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Abstract

Ptychohyla sanctaecrucis is named from the subtropical wet forest of the Sierra de Santa Cruz in Guatemala. The genus Ptychohyla is redefined to include 10 species, the larvae of which have large ventral mouths with minimally 2-3/5, and up to 6/9, long tooth rows and well developed lateral folds. A new genus, Deullmanohyla, is described for the Central American group of hylid frogs with larvae having large pendant mouths with 2/2, 2/3, or 3/3 short tooth rows. The phylogeny of these problematical groups of frogs is analyzed with an emphasis on larval morphology and certain sexually dimorphic features. Two species, P. macrotympanum and D. chamulae, are resurrected from synonymy. /// Se describe una nueva especie de hylido, Ptychohyla sanctaecrucis, del bosque lluvioso subtropical de la Sierra de Santa Cruz, Guatemala. Se caracteriza por su gran tamaño (hembras hasta 50.7 mm); machos adultos con pequeñas espinas nupciales, y un canto que consiste en notas tartamudas y bajas; membranas interdigitales reducidas en las manos; iris castaño muy pálido, casi blanco, con finas marcas cafés. Las larvas poseen una boca grande ventral con pliegues laterales, dos hileras de papilas laterales, y dientes en hileras largas en relación 5/7. La composición del género Ptychohyla se redelimita haciendo énfasis en morfología larval y caracteres relacionados a dimorfismo sexual. Se incluye en el género a Hyla salvadorensis, H. legeri, H. erythromma, Ptychohyla panchoi, P. merazi, P. sanctaecrucis, y las taxa del grupo euthysanota (sensu Duellman, 1970) antes reconocidas. Se describe un nuevo género de hylido, Duellmanohyla. Las larvas de este género poseen una boca gigante y pendiente con una hilera de papilas laterales y dientes en hileras cortas en relación 2/2, 2/3, o 3/3. Se presenta un cladograma de los géneros Duellmanohyla y Ptychohyla y se sugiere estatus específico para D. chamulae Duellman (1961) y P. macrotympanum (Tanner, 1957).

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