We analyzed and described quantitative differences in morphology and calls of Physalaemus petersi and P. freibergi, both members of the monophyletic Physalaemus pustulosus species group. We found significant differences between the two species in both morphometric and call parameters. Physalaemus petersi has proportionately longer legs and a narrower dorsum and head than P. freibergi. The calls of P. petersi are higher in frequency and longer than P. freibergi. Discriminant Function Analysis (DFA) of morphometric variables correctly classified 76.7–87.4% of individuals to species. DFA of call variables correctly classified 96.8–100.0% of males to species. Physalaemus petersi is found north of the Río Marañon and Río Amazonas in eastern Ecuador, northeastern Peru, and southeastern Colombia; P. freibergi is found south of these rivers in Amazonian Brazil, southeastern Peru, and Amazonian Bolivia. Calls and geographic locations are the most reliable means of identifying these species in the field.
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September 2008
Articles|
September 01 2008
Comparison of Morphology and Calls of Two Cryptic Species of Physalaemus (Anura: Leiuperidae)
W Chris Funk;
W Chris Funk
7
1Section of Integrative Biology, University of Texas, Austin, TX 78712, USA
6Present Address: Department of Biology, Colorado State University, Fort Collins, CO 80523, USA
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Ariadne Angulo;
Ariadne Angulo
2Departamento de Herpetología, Museo de Historia Natural de San Marcos, Lima, Peru
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Janalee P. Caldwell;
Janalee P. Caldwell
3Sam Noble Oklahoma Museum of Natural History, Department of Zoology, University of Oklahoma, Norman, OK 73032, USA
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Michael J. Ryan;
Michael J. Ryan
1Section of Integrative Biology, University of Texas, Austin, TX 78712, USA
4Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Panama
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David C. Cannatella
David C. Cannatella
1Section of Integrative Biology, University of Texas, Austin, TX 78712, USA
5Texas Memorial Museum, University of Texas, Austin, TX 78712, USA
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Herpetologica (2008) 64 (3): 290–304.
Article history
Accepted:
August 11 2008
Citation
W Chris Funk, Ariadne Angulo, Janalee P. Caldwell, Michael J. Ryan, David C. Cannatella; Comparison of Morphology and Calls of Two Cryptic Species of Physalaemus (Anura: Leiuperidae). Herpetologica 1 September 2008; 64 (3): 290–304. doi: https://doi.org/10.1655/08-019.1
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