AmphibiaWeb - Leptodactylus fragilis


(Translations may not be accurate.)

Leptodactylus fragilis (Brocchi, 1877)
Mexican White-lipped Frog
family: Leptodactylidae
subfamily: Leptodactylinae
genus: Leptodactylus
Leptodactylus fragilis
© 2017 Dr. Joachim Nerz (1 of 16)

sound file   hear Fonozoo call

Conservation Status (definitions)
IUCN Red List Status Account Least Concern (LC)
NatureServe Use NatureServe Explorer to see status.
National Status None
Regional Status Texas State Listed Threatened
conservation needs Access Conservation Needs Assessment Report .


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View distribution map in BerkeleyMapper.
amphibiandisease logo View Bd and Bsal data (4 records).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Belize, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, United States, Venezuela

U.S. state distribution from AmphibiaWeb's database: Texas

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View distribution map in BerkeleyMapper.
amphibiandisease logo View Bd and Bsal data (4 records).

This species was featured in News of the Week 4 April 2022:

The evolutionary transition to terrestriality and terrestrial breeding in amphibians has occurred repeatedly, but have the required key adaptations, e.g., resistance to desiccation and toxic ammonia build-up, likewise been repeated? Méndez-Narváez and Warkentin (2022) examined this question in a comparative study of four frog lineages, contrasting either short (Agalychnis callidryas, Engystomops pustulosus) or long (Hyalinobatrachium fleischmanni, Leptodactylus fragilis) larval exposure to desiccating conditions. They carried out experiments in an open lab in the rainforests of Gamboa, Panama (Smithsonian Tropical Research Institution). By manipulating environmental conditions (wet vs. dry) and tracking levels of ammonia and urea excretion, they evaluated the tolerance to ammonia exhibited by larvae of each species. They found the two species (H. fleischmanni, L. fragilis) which experience the highest risk of desiccation showed clear evidence for urea production and for pronounced increases in urea excretion, whereas the other two did not. Without urea excretion, the larvae of the high-risk species could experience lethal conditions, providing a clear case for the adaptive value of urea production in these species. They also compared the two foam-nesting species (E. pustulosus, L. fragilis) and two leaf-breeding species (H. fleischmanni, A. callidryas), demonstrating the similar changes in nitrogen metabolism in response to desiccation risk in both comparisons. Their study provides important evidence for the potentially key role of adaptive plasticity in mediating major evolutionary changes. (by Kyle Summers)

A Spanish-language species account can be found at the website of Instituto Nacional de Biodiversidad (INBio).

Originally submitted by: Michelle S. Koo (2021-04-27)
Comments by: Michelle S. Koo (updated 2021-04-27)

Edited by: Michelle S. Koo (2022-04-03)

Species Account Citation: AmphibiaWeb 2022 Leptodactylus fragilis: Mexican White-lipped Frog <> University of California, Berkeley, CA, USA. Accessed Jul 20, 2024.

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Citation: AmphibiaWeb. 2024. <> University of California, Berkeley, CA, USA. Accessed 20 Jul 2024.

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